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  • Aircrack-ng, is it illegal?

    - by Jasen
    I just found out about this linux-based network toolset called aircrack-ng, and its pretty interesting, and I'm learning how to use it. But it just occured to me, that like a lot of linux programs, they're developed in foreign countries, with different laws. I did do a google search, and the only thing in regards to what i am asking that pops up is a question on another site. So, my question is, is it illegal in America, specifically Ohio, to use this program? I mean i know it has a legitimate purpose, but so does hemp. Also, sorry if this is the wrong place for this question, but I'm not exactly sure where it should go.

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  • Internet connection very slow after Linksys configuration

    - by NLV
    Hello We have this network setup Server1 - DHCP server, Domain Controller, AD Lease line for Internet connection From lease line to Linksys router (we dont use wireless though) From linksys to Netgear (24 port Switch) and vonage (VoIP) Netgear to all our machines We configured Linsys with the static IP and DNS server addresses our ISP gave and we have routed it correctly. All our work machines are configured with Get IP automatically DNS server addresses our ISP gave The problem is that none of the sites are getting opened promptly. It is taking around 5 minutes to load google.com. But we are able to ping all the sites. What could be the problem?

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  • How to use CLEAR USB internet connection in Ubuntu (host) and WindowsXP (guest) using VirtualBox

    - by bithacker
    I'm trying to use CLEAR Motorola WiMax USB in Ubuntu as there is no support for linux as yet. I've installed windowsxp as guest in ubuntu and the version I'm using is 3.2.2. USB is connecting fine in WindowsXP but I can't use internet in Ubuntu. Can you please tell me how to do it. Here is the configuration that could help you guys. Thanks in advance. I'm using Two Network Adapters. Network Adapter 1: PCnet-FAST III (NAT) Adapter 2: PCnet-FAST III (Host-only adapter, 'vboxnet0') ipconfig [on Guest windowsXP] Windows IP Configuration Ethernet adapter Local Area Connection: PCnet-FAST III (NAT) Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 10.0.2.15 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 10.0.2.2 Ethernet adapter Local Area Connection 3: PCnet-FAST III (Host-only adapter, 'vboxnet0') Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 192.168.56.101 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : Ethernet adapter Local Area Connection 2: Connection-specific DNS Suffix . : CLEAR Motorola USB IP Address. . . . . . . . . . . . : 10.168.242.33 Subnet Mask . . . . . . . . . . . : 255.255.192.0 Default Gateway . . . . . . . . . : 10.168.192.2 IFCONFIG [on Host Ubuntu] (Ethernet) eth0 Link encap:Ethernet HWaddr 00:14:22:b9:9d:76 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:16 eth1 (Wireless) Link encap:Ethernet HWaddr 00:13:ce:f0:9b:0d inet6 addr: fe80::213:ceff:fef0:9b0d/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:1 errors:0 dropped:5 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:84 (84.0 B) Interrupt:17 Base address:0xe000 Memory:dfcff000-dfcfffff lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:2292 errors:0 dropped:0 overruns:0 frame:0 TX packets:2292 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:171952 (171.9 KB) TX bytes:171952 (171.9 KB) vboxnet0 Link encap:Ethernet HWaddr 0a:00:27:00:00:00 inet addr:192.168.56.1 Bcast:192.168.56.255 Mask:255.255.255.0 inet6 addr: fe80::800:27ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:137 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:21174 (21.1 KB)

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  • Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

    - by Javier
    I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are 'untagged' and belong to a single VLAN, except for the ports used to join together the switches (in a star topology), these ports belong to all VLANs and use 802.1Q tags. So far, it works really well. But on this new switch (a Dell PowerConnect 5448), the settings are very different (and confusing). I have configured the same VLANs, an the uplink ports are set in 'general' mode (supposed to be fully 802.1Q compliant), I can set the VLAN membership as 'T' on these ports for all VLANs except VLAN 1. It always stay as 'U' on VLAN 1. Any ideas?

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  • Lync using SQL 2008 R2 SP1 - Publish Topology error

    - by EKS
    Error that shows in the web page opened by the Topology builder: Error: An error occurred: "Microsoft.Rtc.Common.Data.SqlConnectionException" "A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)" Looking in the log file: ( I assume this is the acutal error making it STOP) Installed SQL Server 2005 Backward Compatibility version is 8.05.1054 Error: SQL Server 2005 Backward Compatibility is not installed or its version is not high enough. SQL Server 2005 Backward Compatability SP2 or higher must be installed. I have installed SQLServer2005_BC_x64.msi from MS, and cant seem to find this SP2 version. SQL server is a 2008 R2 SP1. I have also tested with a 2008 SP3 SQL server same error. Named pippes output via ( OSQL /L) SQL-2008-1 SQL2

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  • how to run apache2 or nginx + php on iPhone? [closed]

    - by Rubytastic
    Is there a way to run Apache2 or Nginx with PHP on the iPhone? Im surprised so little info is available on this topic, as it seems quite interesting to host websites on an iPhone. Consider slow 3G connections or no 3G at all, and you want to demonstrate some webapplication you wrote... hosting them on the iphone would be an awsome way to fix the speed issues with the mobile network speeds. For the Ipad there are several addoptions available, nothing much usable on iphone / nginx apache2 search terms anywhere :( I want to host some websites on my iphone for demonstration purposes. So when im "out the office" Ill be able to very fast browse some websites that I host on the Iphone. there is no decent information out there, does anyone have a lead on how to do this? My question is specific to if nginx or apache2 can be run on the iphone, it would be nice if PHP would run on it too

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  • Why is Samba Access from Windows So Slow?

    - by swalker2001
    I have set up a file server using Ubuntu 12.04 Server. The purpose is to serve several network drives to Windows users that have heretofore been served by numerous NAS drives. I have Samba set up with one share defined so far. I can connect to it fine from my test Windows 7 and Windows XP machines. When I do a directory listing on the share from Windows, it can take up to two minutes to get all the files listed--would have taken about 1.5 seconds when I was using the Buffalo NAS. Sometimes it times out with no response at all. I have used the default smb.conf and simply added the following for the share I have set up so far: [engineering] comment = Ubuntu File Server Share path = /networkdriveshares/engineering browsable = yes guest ok = yes read only = no create mask = 0755 I have tried changing the workgroup setting to the Active Domain name our Windows computer use but didn't notice any difference. The only other change I made to the default smb.conf was adding in the recommended socket settings: SO_RCVBUF=8192 SO_SNDBUF=8192 socket options = TCP_NODELAY Lots of information about slow Samba shares online but I have tried all of the solutions I have found and none have made a lick of difference. If there is no solution, is there a better way to set up a file server to be used by Windows clients?

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  • Subdomain still times out after being set up a month ago

    - by user8137
    I would like to use the subdomain www.high-res.domain.com to be accessed by external customers with specific permissions to access the site (like FTP). We use Network Solutions to house domain.com. We recently added a new IP address to point to www.high-res.domain.com. I gave the IP address to the company that hosts our website. I pinged www.high-res.domain.com and it points to the correct IP address but still times out. It’s been a few weeks now and when you ping it, it still times out. C:\>ping XXX.XXX.X.XXX Pinging XXX.XXX.X.XXX with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for XXX.XXX.X.XXX: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss). tracert times out as well. I even went to DNS tools and a few other sites for checking this and it shows the same thing. I recently went into the DNSmgmt on our server (wink2k3sp1) and created an A record under the DomainDnsZones which translated to a CNAME when you look at it. Under the domain it has two entries, one to the subdomain and the other to the website host. Each has separate IP addresses. Is this correct?

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  • WiFi can't reconnect after suspend/hibernate on Ubuntu 12.04.1

    - by CyberOPS
    I've had this problem since Ubuntu 11.10 (my first install) but I was able to get around this issue with this answer. When I updated to Ubuntu 12.04 I encrypted the home folder, so I wasn't able to suspend or hibernate anymore (disappointing :l). Because of this and another issue I had1, I chose to reinstall. Sometime after I reinstalled, I was reminded about reconnection issue because it wasn't working after I suspended. I tried to use the same fix as before but I couldn't get it to work. I've also tried a couple other different fixes I found around the web but they didn't work. Since I'm new to linux, I'm gonna have a tough time figuring this out by myself. So does anyone know how, or what I need to figure out how, to fix this? Info: Computer: HP Pavilion dv6t-6b00 CTO Quad Edition Entertainment Notebook PC Network Card: Intel® Centrino® Wireless-N 1000 OS: Ubuntu 12.04.1 (x64) dual booting with Windows 7 (x64) (Not using Wubi) Wireless Card Driver: Intel Wireless WiFi Link drivers for Linux (iwlwifi) 1 - ntfs-config caused colord to crash on startup, even after NTFS-Config was removed.

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  • Stream music from Laptop to iPod Touch over Wi-Fi

    - by codeulike
    Rather than running a long cable from my Laptop to my stereo, I've been thinking for a while about getting one of those wireless devices that lets you transmit audio from your PC to a receiver plugged into the stereo. Then I realised I already have hardware that can potentially do this - I have an iPod Touch, and a Wi-Fi network in the house. So, is there some iPod Touch App that will let the iPod act as a Wi-Fi music receiver? And presumably, a corresponding piece of broadcast software for my (Windows Vista) Laptop?

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  • HTTP 400 error for all websites

    - by Jason Sherman
    A couple of days ago, I started getting HTTP 400 responses from all websites. Nothing will go across port 80. However, everything works if I connect to VPN. The weird thing is, without VPN, other things still work; such as IM and anything else that doesn’t use port 80. Pinging also works. I haven’t noticed this behavior on any other computer on my network. The kicker is, if I log on as a local admin, everything works fine!!! I haven’t installed anything in the last couple weeks and I don’t remember changing any configuration. I ran Forefront and HouseCall and neither found any problems.

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  • can't access SAMBA shares on UBUNTU-server from other computers

    - by larand
    Installed UBUNTU-server 12.04 and configured /etc/samba/smb.conf as: #======================= Global Settings ======================= [global] workgroup = HEMMA server string = %h server (Samba, Ubuntu) security = user wins support = yes dns proxy = no log file = /var/log/samba/log.%m max log size = 1000 syslog = 0 panic action = /usr/share/samba/panic-action %d encrypt passwords = no passdb backend = tdbsam obey pam restrictions = yes unix password sync = yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . pam password change = yes map to guest = bad user ############ Misc ############ usershare allow guests = yes #======================= Share Definitions ======================= [printers] comment = All Printers browseable = no path = /var/spool/samba printable = yes guest ok = no read only = yes create mask = 0700 # Windows clients look for this share name as a source of downloadable # printer drivers [print$] comment = Printer Drivers path = /var/lib/samba/printers browseable = yes read only = yes guest ok = no [Bilder original] comment = Original bilder path = /mnt/bilder/org browseable = yes read only = no guest ok = no create mask = 0755 [Bilder publika] comment = Bilder för allmän visning path = /mnt/bilder/public browseable = yes read only = yes guest ok = yes [Musik] comment = Musik path = /mnt/music/public browseable = yes read only = yes guest ok = yes I have a network setup around a 4G router "HUAWEI B593" where some computers are connected by WIFI and others by LAN. The server is connected by LAN. On one computer running windows XP I can see the server but are not allowed to acces them. On another computer on the WIFI-net running win7 I cannot see the server at all but I can ping the server and I can see the smb-protocoll is running when sniffing with wireshark. I don't primarily want to use passwords, computers on the lan and wifi should be able to connect without any login-procedure. I'm sure my config is not sufficient but have hard to understand how I should do. Theres a lot of descriptions on the net but most is old and none have been of any help. I'm also confused by the fact that I can not se the sever on my win7-machine even though it communicates with the samba-server. Would be very happy if anyone could spread some light over this mess.

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  • CodePlex Daily Summary for Friday, June 07, 2013

    CodePlex Daily Summary for Friday, June 07, 2013Popular ReleasesASP.NET MVC Forum: MVCForum v1.3.5: This is a bug release version, with a couple of small usability features and UI changes. All the small amount of bugs reported in v1.3 have been fixed, no upgrade needed just overwrite the files and everything should just work.Json.NET: Json.NET 5.0 Release 6: New feature - Added serialized/deserialized JSON to verbose tracing New feature - Added support for using type name handling with ISerializable content Fix - Fixed not using default serializer settings with primitive values and JToken.ToObject Fix - Fixed error writing BigIntegers with JsonWriter.WriteToken Fix - Fixed serializing and deserializing flag enums with EnumMember attribute Fix - Fixed error deserializing interfaces with a valid type converter Fix - Fixed error deser...Christoc's DotNetNuke Module Development Template: DotNetNuke 7 Project Templates V2.3 for VS2012: V2.3 - Release Date 6/5/2013 Items addressed in this 2.3 release Fixed bad namespace for BusinessController in one of the C# templates. Updated documentation in all templates. Setting up your DotNetNuke Module Development Environment Installing Christoc's DotNetNuke Module Development Templates Customizing the latest DotNetNuke Module Development Project TemplatesPulse: Pulse 0.6.7.0: A number of small bug fixes to stabilize the previous Beta. Sorry about the never ending "New Version" bug!ZXMAK2: Version 2.7.5.3: - debugger: add LPC indicator (last executed opcode pc) - add host joystick support (written by Eltaron) - change file extension for CMOS PENTEVO to "cmos" - add hardware value monitor (see Memory Map for PENTEVO/ATM/PROFI)QlikView Extension - Animated Scatter Chart: Animated Scatter Chart - v1.0: Version 1.0 including Source Code qar File Example QlikView application Tested With: Browser Firefox 20 (x64) Google Chrome 27 (x64) Internet Explorer 9 QlikView QlikView Desktop 11 - SR2 (x64) QlikView Desktop 11.2 - SR1 (x64) QlikView Ajax Client 11.2 - SR2 (based on x64)BarbaTunnel: BarbaTunnel 7.2: Warning: HTTP Tunnel is not compatible with version 6.x and prior, HTTP packet format has been changed. Check Version History for more information about this release.SuperWebSocket, a .NET WebSocket Server: SuperWebSocket 0.8: This release includes these changes below: Upgrade SuperSocket to 1.5.3 which is much more stable Added handshake request validating api (WebSocketServer.ValidateHandshake(TWebSocketSession session, string origin)) Fixed a bug that the m_Filters in the SubCommandBase can be null if the command's method LoadSubCommandFilters(IEnumerable<SubCommandFilterAttribute> globalFilters) is not invoked Fixed the compatibility issue on Origin getting in the different version protocols Marked ISub...BlackJumboDog: Ver5.9.0: 2013.06.04 Ver5.9.0 (1) ?????????????????????????????????($Remote.ini Tmp.ini) (2) ThreadBaseTest?? (3) ????POP3??????SMTP???????????????? (4) Web???????、?????????URL??????????????? (5) Ftp???????、LIST?????????????? (6) ?????????????????????Media Companion: Media Companion MC3.569b: New* Movies - Autoscrape/Batch Rescrape extra fanart and or extra thumbs. * Movies - Alternative editor can add manually actors. * TV - Batch Rescraper, AutoScrape extrafanart, if option enabled. Fixed* Movies - Slow performance switching to movie tab by adding option 'Disable "Not Matching Rename Pattern"' to Movie Preferences - General. * Movies - Fixed only actors with images were scraped and added to nfo * Movies - Fixed filter reset if selected tab was above Home Movies. * Updated Medi...Nearforums - ASP.NET MVC forum engine: Nearforums v9.0: Version 9.0 of Nearforums with great new features for users and developers: SQL Azure support Admin UI for Forum Categories Avoid html validation for certain roles Improve profile picture moderation and support Warn, suspend, and ban users Web administration of site settings Extensions support Visit the Roadmap for more details. Webdeploy package sha1 checksum: 9.0.0.0: e687ee0438cd2b1df1d3e95ecb9d66e7c538293b Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.93: Added -esc:BOOL switch (CodeSettings.AlwaysEscapeNonAscii property) to always force non-ASCII character (ch > 0x7f) to be escaped as the JavaScript \uXXXX sequence. This switch should be used if creating a Symbol Map and outputting the result to the a text encoding other than UTF-8 or UTF-16 (ASCII, for instance). Fixed a bug where a complex comma operation is the operand of a return statement, and it was looking at the wrong variable for possible optimization of = to just .VG-Ripper & PG-Ripper: VG-Ripper 2.9.42: changes NEW: Added Support for "GatASexyCity.com" links NEW: Added Support for "ImgCloud.co" links NEW: Added Support for "ImGirl.info" links NEW: Added Support for "SexyImg.com" links FIXED: "ImageBam.com" linksDocument.Editor: 2013.22: What's new for Document.Editor 2013.22: Improved Bullet List support Improved Number List support Minor Bug Fix's, improvements and speed upsCarrotCake, an ASP.Net WebForms CMS: Binaries and PDFs - Zip Archive (v. 4.3 20130528): Features include a content management system and a robust featured blogging engine. This includes configurable date based blog post URLs, blog post content association with categories and tags, assignment/customization of category and tag URL patterns, simple blog post feedback collection and review, blog post pagination/indexes, designation of default blog page (required to make search, category links, or tag links function), URL date formatting patterns, RSS feed support for posts and pages...PHPExcel: PHPExcel 1.7.9: See Change Log for details of the new features and bugfixes included in this release, and methods that are now deprecated.Droid Explorer: Droid Explorer 0.8.8.10 Beta: Fixed issue with some people having a folder called "android-4.2.2" in their build-tools path. - 16223 Magick.NET: Magick.NET 6.8.5.402: Magick.NET compiled against ImageMagick 6.8.5.4. These zip files are also available as a NuGet package: https://nuget.org/profiles/dlemstra/patterns & practices: Data Access Guidance: Data Access Guidance Drop3 2013.05.31: Drop 3DotNet.Highcharts: DotNet.Highcharts 2.0 with Examples: DotNet.Highcharts 2.0 Tested and adapted to the latest version of Highcharts 3.0.1 Added new chart types: Arearange, Areasplinerange, Columnrange, Gauge, Boxplot, Waterfall, Funnel and Bubble Added new type PercentageOrPixel which represents value of number or number with percentage. Used for sizes, width, height, length, etc. Removed inheritances in YAxis option classes. Closed issues: 682: Missing property - XAxisPlotLinesLabel.Text 688: backgroundColor and plotBackgroundColor are...New ProjectsAccountingTest: just to learn asp.net mvc 3 Agile Poker Cards for Windows Mobile: During a scrum or other agile processes, you have to estimate the size of a user story during a planning session. With the Agile Poker Cards program there is no need for using real cards anymore!Buildinator: Buildinator generates TFS Build definitions from an XML file, enabling canonical "templates" that make it easy to add or copy build definitions.Clipboard Capture Plugin: Captures an image in the clipboard and gives you more options to insert the image into Live WriterComercial HS: Commercial hsCommonExtranet: CommonExtranet is a basis for an Extranet web site with a user authentication mechanism that incorporates password aging and various features expected on a domain LogOnDataVeryLite: DataVeryLite is a lightweight *Persistence Framework*. DataVeryLite???????*?????*. ??????Nhibernate?????,??Linq to sql???????,?????DataVeryLite.daydayup: snd\realdamon_cpDNN Extension Url Providers: The DNN Extension Url Providers project contains installable extensions for extending DNN URL functionality.DotNetNuke Kitchen Sink: A sample module project for DotNetNuke with a variety of different scenarios covered.Football Team Management: Manage team, player, match and staffFreePiano: Play piano using your computer keyboard.GIF animator: Dev in progessI'm Feeling Lucky Plugin: Lets you put a link in that acts as though doing an I'm Feeling Lucky search.Insert Video Jnr: This is a baby version of my Video plugin, it is intended for Hosted Wordpress blogs only and shouldn't be used with other blog providers.jabbrmercurial: 22Kax.WebControls.RadioButtonList: Web Custom Control that extend RadioButtonList to allow uncheckable state.Kinect Screen Aware: Kinect Screen Aware uses a Kinect to detect touch, hover, gestures, and voice on a standard television display. It's designed to be low cost and easy to setuplppbop: Aplikasi Laporan Bantuan Operasional PendidikanmobiSms: mobismsnga: National Geography of AzerothRadminPassword: ????????? ??? ??????????????? ????? ??????? ? ????????? ????????? ?????????? ?????????? ?? Radmin. A program to automatically enter the passwords in the famous PC remote control software Radmin.Rx Heat: Rx Heat is a library of helper classes that complements the Reactive Extensions Library with additional features. Schema Generator: The basic idea behind this utility is to emit the database schema from an existing SQL Server database. From a developer perspective, it is sometimes very much handy to quickly take a printout of the database structure for creating the UI layout.SharePoint Packager: Perform the instalation, upgrade and retraction of Ms Sharepoint Applications fast, easy and efficientsmartTouch: :-)SpotifyLync: A small tray application that reports your Spotify status to your Microsoft Lync client. Alos contains additional Spotify / Lync features.Syngine: A simple to use game framework using MonoGame and Farseer Physicstest060601CM: testtestMC053003: testToSic.Eav: A powerfull EAV (Entity-Attribute-Value) system created by 2sic Internet Solutions in Switzerland. It's currently mainly used inside 2SexyContent for DotNetNukeTraceLight: <project name> TraceLight ray tracer </project name> <programming language> C# </programming language>trakr: minimalist webtracking software written in python and twistedTwitterXML: A .NET wrapper library for the Twitter REST API. Currently, all of the methods return an XMLDocument. Also included are classes for Users, Statuses, and Direct Messages that use XML serialization for converting the XML responses to objects with a Deserialize() call.Universal Parking Centre: Universal Parking Centre is a website-based software developed by Center Code to help you in organizing your parking business.Velocity OS: Be fast, Be strong. It's Velocity.WinKeGen Code Samples: This project will allow beginning developers a close look at some code samples and variations of how to use those samples in their own code.WinRT Synth lib: Project Description this project aims to provide an easy-to-use API, for sound synthesis under winrt, in c#. It use the XAudio2 api for the playback of the sounWpfCollaborative3D: WpfCollaborative3DX-Parking: Our online parking sites , try at : x-parking.pemrogramaninternet.infoYnote Plugins: Ynote Classic Plugins which help in transforming Ynote Classic into a powerful HTML / XML Editor or an IDE.

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  • Solving Big Problems with Oracle R Enterprise, Part I

    - by dbayard
    Abstract: This blog post will show how we used Oracle R Enterprise to tackle a customer’s big calculation problem across a big data set. Overview: Databases are great for managing large amounts of data in a central place with rigorous enterprise-level controls.  R is great for doing advanced computations.  Sometimes you need to do advanced computations on large amounts of data, subject to rigorous enterprise-level concerns.  This blog post shows how Oracle R Enterprise enables R plus the Oracle Database enabled us to do some pretty sophisticated calculations across 1 million accounts (each with many detailed records) in minutes. The problem: A financial services customer of mine has a need to calculate the historical internal rate of return (IRR) for its customers’ portfolios.  This information is needed for customer statements and the online web application.  In the past, they had solved this with a home-grown application that pulled trade and account data out of their data warehouse and ran the calculations.  But this home-grown application was not able to do this fast enough, plus it was a challenge for them to write and maintain the code that did the IRR calculation. IRR – a problem that R is good at solving: Internal Rate of Return is an interesting calculation in that in most real-world scenarios it is impractical to calculate exactly.  Rather, IRR is a calculation where approximation techniques need to be used.  In this blog post, we will discuss calculating the “money weighted rate of return” but in the actual customer proof of concept we used R to calculate both money weighted rate of returns and time weighted rate of returns.  You can learn more about the money weighted rate of returns here: http://www.wikinvest.com/wiki/Money-weighted_return First Steps- Calculating IRR in R We will start with calculating the IRR in standalone/desktop R.  In our second post, we will show how to take this desktop R function, deploy it to an Oracle Database, and make it work at real-world scale.  The first step we did was to get some sample data.  For a historical IRR calculation, you have a balances and cash flows.  In our case, the customer provided us with several accounts worth of sample data in Microsoft Excel.      The above figure shows part of the spreadsheet of sample data.  The data provides balances and cash flows for a sample account (BMV=beginning market value. FLOW=cash flow in/out of account. EMV=ending market value). Once we had the sample spreadsheet, the next step we did was to read the Excel data into R.  This is something that R does well.  R offers multiple ways to work with spreadsheet data.  For instance, one could save the spreadsheet as a .csv file.  In our case, the customer provided a spreadsheet file containing multiple sheets where each sheet provided data for a different sample account.  To handle this easily, we took advantage of the RODBC package which allowed us to read the Excel data sheet-by-sheet without having to create individual .csv files.  We wrote ourselves a little helper function called getsheet() around the RODBC package.  Then we loaded all of the sample accounts into a data.frame called SimpleMWRRData. Writing the IRR function At this point, it was time to write the money weighted rate of return (MWRR) function itself.  The definition of MWRR is easily found on the internet or if you are old school you can look in an investment performance text book.  In the customer proof, we based our calculations off the ones defined in the The Handbook of Investment Performance: A User’s Guide by David Spaulding since this is the reference book used by the customer.  (One of the nice things we found during the course of this proof-of-concept is that by using R to write our IRR functions we could easily incorporate the specific variations and business rules of the customer into the calculation.) The key thing with calculating IRR is the need to solve a complex equation with a numerical approximation technique.  For IRR, you need to find the value of the rate of return (r) that sets the Net Present Value of all the flows in and out of the account to zero.  With R, we solve this by defining our NPV function: where bmv is the beginning market value, cf is a vector of cash flows, t is a vector of time (relative to the beginning), emv is the ending market value, and tend is the ending time. Since solving for r is a one-dimensional optimization problem, we decided to take advantage of R’s optimize method (http://stat.ethz.ch/R-manual/R-patched/library/stats/html/optimize.html). The optimize method can be used to find a minimum or maximum; to find the value of r where our npv function is closest to zero, we wrapped our npv function inside the abs function and asked optimize to find the minimum.  Here is an example of using optimize: where low and high are scalars that indicate the range to search for an answer.   To test this out, we need to set values for bmv, cf, t, emv, tend, low, and high.  We will set low and high to some reasonable defaults. For example, this account had a negative 2.2% money weighted rate of return. Enhancing and Packaging the IRR function With numerical approximation methods like optimize, sometimes you will not be able to find an answer with your initial set of inputs.  To account for this, our approach was to first try to find an answer for r within a narrow range, then if we did not find an answer, try calling optimize() again with a broader range.  See the R help page on optimize()  for more details about the search range and its algorithm. At this point, we can now write a simplified version of our MWRR function.  (Our real-world version is  more sophisticated in that it calculates rate of returns for 5 different time periods [since inception, last quarter, year-to-date, last year, year before last year] in a single invocation.  In our actual customer proof, we also defined time-weighted rate of return calculations.  The beauty of R is that it was very easy to add these enhancements and additional calculations to our IRR package.)To simplify code deployment, we then created a new package of our IRR functions and sample data.  For this blog post, we only need to include our SimpleMWRR function and our SimpleMWRRData sample data.  We created the shell of the package by calling: To turn this package skeleton into something usable, at a minimum you need to edit the SimpleMWRR.Rd and SimpleMWRRData.Rd files in the \man subdirectory.  In those files, you need to at least provide a value for the “title” section. Once that is done, you can change directory to the IRR directory and type at the command-line: The myIRR package for this blog post (which has both SimpleMWRR source and SimpleMWRRData sample data) is downloadable from here: myIRR package Testing the myIRR package Here is an example of testing our IRR function once it was converted to an installable package: Calculating IRR for All the Accounts So far, we have shown how to calculate IRR for a single account.  The real-world issue is how do you calculate IRR for all of the accounts?This is the kind of situation where we can leverage the “Split-Apply-Combine” approach (see http://www.cscs.umich.edu/~crshalizi/weblog/815.html).  Given that our sample data can fit in memory, one easy approach is to use R’s “by” function.  (Other approaches to Split-Apply-Combine such as plyr can also be used.  See http://4dpiecharts.com/2011/12/16/a-quick-primer-on-split-apply-combine-problems/). Here is an example showing the use of “by” to calculate the money weighted rate of return for each account in our sample data set.  Recap and Next Steps At this point, you’ve seen the power of R being used to calculate IRR.  There were several good things: R could easily work with the spreadsheets of sample data we were given R’s optimize() function provided a nice way to solve for IRR- it was both fast and allowed us to avoid having to code our own iterative approximation algorithm R was a convenient language to express the customer-specific variations, business-rules, and exceptions that often occur in real-world calculations- these could be easily added to our IRR functions The Split-Apply-Combine technique can be used to perform calculations of IRR for multiple accounts at once. However, there are several challenges yet to be conquered at this point in our story: The actual data that needs to be used lives in a database, not in a spreadsheet The actual data is much, much bigger- too big to fit into the normal R memory space and too big to want to move across the network The overall process needs to run fast- much faster than a single processor The actual data needs to be kept secured- another reason to not want to move it from the database and across the network And the process of calculating the IRR needs to be integrated together with other database ETL activities, so that IRR’s can be calculated as part of the data warehouse refresh processes In our next blog post in this series, we will show you how Oracle R Enterprise solved these challenges.

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  • Setting up Beats audio on HP Pavilion m6

    - by Joel Auterson
    I have an HP Pavilion m6-1054sa laptop, with a Beats subwoofer on the bottom. The normal laptop speakers work fine under Ubuntu but the Beats speaker(s?) does not. Anyone know how to get this working? Here's my lspci output, if it helps... 00:00.0 Host bridge: Intel Corporation Ivy Bridge DRAM Controller (rev 09) 00:01.0 PCI bridge: Intel Corporation Ivy Bridge PCI Express Root Port (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09) 00:14.0 USB controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4) 00:1c.1 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 2 (rev c4) 00:1d.0 USB controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04) 00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Thames XT/GL [Radeon HD 7600M Series] (rev ff) 07:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5289 (rev 01) 07:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 0a) 08:00.0 Network controller: Intel Corporation Centrino Wireless-N 2230 (rev c4)

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  • SBS 2003 R2 install errors

    - by piagetblix
    I just installed sbs2003 R2 as a learning lab box on my home network. The install seemed to take quit a while with a bit of shuffling between disks 4 and 5. The continue setup checklist showed the red x besides the exchange install and finally gave me an error about the "schema needing extending run, forest /adprep" and told me at the end that the install did not succeed. After a longer than normal reboot it comes up and seems to be OK. What logs do i need to check to see what went wrong? Should i reinstall and try burning the iso's to new media? cheers

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  • Windows 7 - Virtualbox host only adapter doesn't get an IP

    - by Craig
    When I create a new host only network adapter, it will not set the IP address I assign to it. After I save the IP address & netmask it looks like it works (I see the Windows 7 User Account Control verification box), but the IP address doesn't get stored on the adapter. I have tried adding/removing the adapter from within virtualbox and settings the values manually in the Windows aapter settings dialogue. I am using a Windows 7 host. Does anyone know why the settings don't get saved, or how to get more information? C:\Program Files\Oracle\VirtualBox>VBoxManage list hostonlyifs Name: VirtualBox Host-Only Ethernet Adapter GUID: 1721835e-e2c8-4f52-90fe-df7227ebe037 DHCP: Disabled IPAddress: 0.0.0.0 NetworkMask: 0.0.0.0 IPV6Address: IPV6NetworkMaskPrefixLength: 0 HardwareAddress: 00:00:00:00:00:00 MediumType: Unknown Status: Unknown VBoxNetworkName: HostInterfaceNetworking-VirtualBox Host-Only Ethernet Adapter

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  • CodePlex Daily Summary for Monday, September 10, 2012

    CodePlex Daily Summary for Monday, September 10, 2012Popular ReleasesJson Services: Json Services 0.3.2: Json Services 0.3.2 released This release includes: JavaScript support Android support Flex SupportServiceMon - Extensible Real-time, Service Monitoring Utility: ServiceMon Release 0.9.0.50: Auto-uploaded from build serverSocial Network Importer for NodeXL: SocialNetImporter(v.1.5): This new version includes: - Fixed the "resource limit" bug caused by Facebook - Bug fixes To use the new graph data provider, do the following: Unzip the Zip file into the "PlugIns" folder that can be found in the NodeXL installation folder (i.e "C:\Program Files\Social Media Research Foundation\NodeXL Excel Template\PlugIns") Open NodeXL template and you can access the new importer from the "Import" menuAcDown????? - AcDown Downloader Framework: AcDown????? v4.1: ??●AcDown??????????、??、??、???????。????,????,?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。 ●??????AcPlay?????,??????、????????????????。 ● AcDown??????????????????,????????????????????????????。 ● AcDown???????C#??,????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ???? 32??64? ???Linux ????(1)????????Windows XP???,?????????.NET Framework 2.0???(x86),?????"?????????"??? (2)???????????Linux???,????????Mono?? ?...Move Mouse: Move Mouse 2.5.2: FIXED - Minor fixes and improvements.MVC Controls Toolkit: Mvc Controls Toolkit 2.3: Added The new release is compatible with Mvc4 RTM. Support for handling Time Zones in dates. Specifically added helper methods to convert to UTC or local time all DateTimes contained in a model received by a controller, and helper methods to handle date only fileds. This together with a detailed documentation on how TimeZones are handled in all situations by the Asp.net Mvc framework, will contribute to mitigate the nightmare of dates and timezones. Multiple Templates, and more options to...DNN Metro7 style Skin package: Metro7 06.02.00: Maintenance Release Changes on Metro7 06.02.00 Fixed width and height on the jQuery popup for the Editor. Navigation Provider changed to DDR menu Added menu files and scripts Changed skins to Doctype HTML Changed manifest to dnn6 manifest file Changed License to HTML view Fixed issue on Metro7/PinkTitle.ascx with double registering of the Actions Changed source folder structure and start folder, so the project works with the default DNN structure on developing Added VS 20...Mishra Reader: Mishra Reader Beta 4: Additional bug fixes and logging in this release to try to find the reason some users aren't able to see the main window pop up. Also, a few UI tweaks to tighten up the feed item list. This release requires the final version of .NET 4.5. If the ClickOnce installer doesn't work for you, please try the additional setup exe.Xenta Framework - extensible enterprise n-tier application framework: Xenta Framework 1.9.0: Release Notes Imporved framework architecture Improved the framework security More import/export formats and operations New WebPortal application which includes forum, new, blog, catalog, etc. UIs Improved WebAdmin app. Reports, navigation and search Perfomance optimization Improve Xenta.Catalog domain More plugin interfaces and plugin implementations Refactoring Windows Azure support and much more... Package Guide Source Code - package contains the source code Binaries...Json.NET: Json.NET 4.5 Release 9: New feature - Added JsonValueConverter New feature - Set a property's DefaultValueHandling to Ignore when EmitDefaultValue from DataMemberAttribute is false Fix - Fixed DefaultValueHandling.Ignore not igoring default values of non-nullable properties Fix - Fixed DefaultValueHandling.Populate error with non-nullable properties Fix - Fixed error when writing JSON for a JProperty with no value Fix - Fixed error when calling ToList on empty JObjects and JArrays Fix - Fixed losing deci...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.66: Just going to bite the bullet and rip off the band-aid... SEMI-BREAKING CHANGE! Well, it's a BREAKING change to those who already adjusted their projects to use the previous breaking change's ill-conceived renamed DLLs (versions 4.61-4.65). For those who had not adapted and were still stuck in this-doesn't-work-please-fix-me mode, this is more like a fixing change. The previous breaking change just broke too many people, I'm sorry to say. Renaming the DLL from AjaxMin.dll to AjaxMinLibrary.dl...DotNetNuke® Community Edition CMS: 07.00.00 CTP (Not for Production Use): NOTE: New Minimum Requirementshttp://www.dotnetnuke.com/Portals/25/Blog/Files/1/3418/Windows-Live-Writer-1426fd8a58ef_902C-MinimumVersionSupport_2.png Simplified InstallerThe first thing you will notice is that the installer has been updated. Not only have we updated the look and feel, but we also simplified the overall install process. You shouldn’t have to click through a series of screens in order to just get your website running. With the 7.0 installer we have taken an approach that a...BIDS Helper: BIDS Helper 1.6.1: In addition to fixing a number of bugs that beta testers reported, this release includes the following new features for Tabular models in SQL 2012: New Features: Tabular Display Folders Tabular Translations Editor Tabular Sync Descriptions Fixed Issues: Biml issues 32849 fixing bug in Tabular Actions Editor Form where you type in an invalid action name which is a reserved word like CON or which is a duplicate name to another action 32695 - fixing bug in SSAS Sync Descriptions whe...Umbraco CMS: Umbraco 4.9.0: Whats newThe media section has been overhauled to support HTML5 uploads, just drag and drop files in, even multiple files are supported on any HTML5 capable browser. The folder content overview is also much improved allowing you to filter it and perform common actions on your media items. The Rich Text Editor’s “Media” button now uses an embedder based on the open oEmbed standard (if you’re upgrading, enable the media button in the Rich Text Editor datatype settings and set TidyEditorConten...WordMat: WordMat v. 1.02: This version was used for the 2012 exam.menu4web: menu4web 0.4.1 - javascript menu for web sites: This release is for those who believe that global variables are evil. menu4web has been wrapped into m4w singleton object. Added "Vertical Tabs" example which illustrates object notation.Microsoft SQL Server Product Samples: Database: AdventureWorks OData Feed: The AdventureWorks OData service exposes resources based on specific SQL views. The SQL views are a limited subset of the AdventureWorks database that results in several consuming scenarios: CompanySales Documents ManufacturingInstructions ProductCatalog TerritorySalesDrilldown WorkOrderRouting How to install the sample You can consume the AdventureWorks OData feed from http://services.odata.org/AdventureWorksV3/AdventureWorks.svc. You can also consume the AdventureWorks OData fe...Desktop Google Reader: 1.4.6: Sorting feeds alphabetical is now optional (see preferences window)Droid Explorer: Droid Explorer 0.8.8.7 Beta: Bug in the display icon for apk's, will fix with next release Added fallback icon if unable to get the image/icon from the Cloud Service Removed some stale plugins that were either out dated or incomplete. Added handler for *.ab files for restoring backups Added plugin to create device backups Backups stored in %USERPROFILE%\Android Backups\%DEVICE_ID%\ Added custom folder icon for the android backups directory better error handling for installing an apk bug fixes for the Runn...The Visual Guide for Building Team Foundation Server 2012 Environments: Version 1: --New Projectsalimujtaba_project: bhssASP.NET Databinding Tutorial: This is a tutorial project on asp.net databinding.asp.net msaccess tutorial: This is a tutorial projectaspnet gridview: This is a tutorial projectaspnet login tutorial: this is a tutorial projectDataglot - A helper library for System.Data.Common: To support more than one database using System.Data.Common you need connection string conversion, light sql reparsing, multi-cast, trace and many more utilitiesDnsMigrate: This is a small powershell script to move a standalone Microsoft Dns Server to another machine. Also you can backup existing dns records with this script.Elements: Elements is an implementation of the Composite Application Guide for WPF. Written in C# using Visual Studio 2012.EQBAZ: EQ Baz pullFujiy Minesweeper: A MSN Messenger Minesweeper clone. You can play Minesweeper with a friend, who finds more bombs winsHobbyLister: The aim of this project is to create a organizetool for Movies, Books, Boardgame etc.hotfighter2: a gameJihanki: jihankimasterpage tutorial: This a tutorial projectMongo Explorer Tool: Mongo Explorer ToolMSMQ Managment Console: MSMQ Management Console is a command line tool that allows to run variety of commands on local and remote queues, with export and import capabilities.NTCPMSG: High performance open source TCP message send and receive component which written by C#.net.PlaySly: Aplicación para Windows 8 estilo Modern UI para usar series.ly. Está orientada al visionado online, críticas y votaciones. En proceso de construcción.RhotCMS: This is my asp.net MVC 4 CMS.SBQP: Trabalho de Conclusão de Curso de Graduação apresentado a Universidade Estácio de SáSimplyMessenger: SimplyMessenger is a light Network Messenger. It use C# and WPF.toki pona - corpus linguistic tools and various experiments: Various mini-linguistics tools targeting toki pona, a very small fake language. Of potential interest to hobby linguists and conlang enthusiasts.Turbo Server: An FTP Server for Android

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  • Why would a terminal server be kicking users off after about 5 minutes?

    - by Matt
    I have a terminal server that was restored from an old 1U server to an IBM HS20 Blade running ESXi. The restore was using shadow protect hardware independent restore. All appeared to be functioning well but we're finding that users are being periodically kicked off after around 5 minutes or so. The interesting thing is it doesn't appear to be a simple disconnect but the whole session has gone like it was logged out. There is nothing significant in the event log, and certainly nothing from terminal services that is logged. I've also checked the client computers and from the client computers logged into our other terminal server and there wasn't any issues there. It doesn't appear to be network related. Any ideas?

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  • Connecting Clinical and Administrative Processes: Oracle SOA Suite for Healthcare Integration

    - by Mala Ramakrishnan
    One of the biggest IT challenges facing today’s health care industry is the difficulty finding reliable, secure, and cost-effective ways to exchange information. Payers and providers need versatile platforms for enterprise-wide information sharing. Clinicians require accurate information to provide quality care to patients while administrators need integrated information for all facets of the business operation. Both sides of the organization must be able to access information from research and development systems, practice management systems, claims systems, financial systems, and many others. Externally, these organizations must share claims data, patient records, pharmaceutical data, lab reports, and diagnostic information among third party entities—all while complying with emerging standards for formatting, processing, and storing electronic health records (EHR). Service-oriented architecture (SOA) enables developers to integrate many types of software applications, databases and computing platforms within a particular health network as well as with community, state, and national health information exchanges. The Oracle SOA Suite for healthcare integration is designed to provide healthcare organizations with comprehensive integration capabilities within a unified middleware platform, as well as with healthcare libraries and templates for streamlining healthcare IT projects. It reduces the need for specialized skills and enforces an enterprise-wide view of critical healthcare data.  Here is a new white paper that details more about this offering: Oracle SOA Suite for Healthcare Integration

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  • Photo Management Software for OS X That Supports Multiple Library Locations

    - by Lance Rushing
    I'm looking at the possibility of changing our photo management software. Thinking about Aperture or Lightroom. And want to know if either supports: Having folders/libraries on separate harddrives/Volumes. Tolerates having network folders occasionally connected Snappy interface A solid enough piece of software as not to crash or behave weirdly. [ so the wife doesn't get stuck and have to call me ;) ] Background The wife is photographer and I'm the computer programmer. Our current setup is Picasa, with a "Recent/Working" folder on the local iMac harddrive, and "Archive" folders on NFS mounted Linux Server, Raid 5, for redundant and extra storage capacity. (the Linux server also syncs with Amazon's EC2) Picasa is doing OK, but I get annoyed when it doesn't do behave properly. Usually around issues when the Linux disk isn't mounted. And overall, I wish Picasa seemed a little more polished and snappier. Thanks, Lance

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  • What is Cloud Computing?

    - by joelvarty
    This is a question that we discuss quite often at Edentity.  It’s one of those things, kind of like “web services” where the terminology has been thrown around by a ton of people and means a lot of different things. Here’s my favorite diagram so far, which is a visual breakdown of the material presented here by NIST, visualized by the folks at Cloud Security Alliance.     What I like about this diagram is that is shows several different ways that we can differentiate our definitions of cloud computing, from the essential characteristics, or which “Broad Network Access" and “On-Demand Self-Service” (which often are used on their own to define cloud computing) are but a couple of things that help make something “cloud”. The most important section from my point of view is the middle one – the Service Models.  This represents the different ways that cloud computing can be exposed from the ground up.  It can be an Infrastructure, a Platform or a piece of Software that an end user interacts with. This is the future, folks. more late - joel

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  • How do I connect to the serial console port os a Sunfire 280R?

    - by DrStalker
    We have a Sunfire 280R (old SPARC/Solaris server) that is refusing to come up after being relocated. We're trying to connect to the serial console port, but all we get is random gibberish on the screen. We've tried both connecting with a DB25DB9 adapter and using a DB-25-RJ45 adapter with a cisco RJ45-DB9 adapter to a windows laptop. We're configuring the laptop to 9600 baud, 8 bit, 1 stop bit, no parity. We've tried both no flow control and Xon/Xoff. We get the same results hooking up to the serial port on a working SPARC server, so it's probably something in our setup rather than a fault with the server. How do we get access to to serial console so we can work out what is stopping this box from getting to the network? Is there a special sun adapter we need to get/make to get the serial link working?

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  • Handling early/late/dropped packets for interpolation in a 3D multiplayer game

    - by Ben Cracknell
    I'm working on a multiplayer game that for the purposes of this question, is most similar to Team Fortress. Each network data packet will contain the 3D position of the target moving object. (this object could be another player) The packets are sent on a fixed interval, and linear interpolation will be used to smooth the transition between packets. Under normal circumstances, interpolation will occur between the second-to-last packet, and the last packet received. The linear interpolation algorithm is the same as this post: Interpolating positions in a multiplayer game I have the same issue as in that post, but the answers don't seem like they will work in my situation. Consider the following scenario: Normal packet timing, everything is okay The next expected packet is late. That's okay, we'll just extrapolate based on previous positions The late packet eventually arrives with corrections to our extrapolation. Now what do we do with its information? The answers on the above post suggest we should just interpolate to this new packet's position, but that would not work at all. If we have already extrapolated past that point in time, moving back would cause rubber-banding. The issue is similar in the case of an early or dropped packet. So I believe what I am looking for is some way to smoothly deal with new information in an ongoing interpolation/extrapolation process. Since I might be moving on to quadratic or even cubic interpolation, it would be great if the same solutiuon could be applied to those as well.

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  • Understanding DHCP setting for DNS Server Options and Scope Options

    - by Saariko
    I have installed 2 DC's on my network (W2K8 R2) both serve as a replicate DC on my domain. On one of them (DC1) there is also a DHCP server running. On both I have a DNS server running. I am trying to understand the difference in the settings within the DHCP of Server Options and Scope Options. As I understand it: On the server options, I should put an external DNS for system (lets say 8.8.8.8 - google) And on the scope options, I should put both my internal dc1 and dc2 IP's as the server. - which are than distributed to my domain clients. Is that correct? Is there a better way? Do I need to add loopback address as well?

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