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• links for 2010-04-13

  - by Bob Rhubart

  Frederic Michiar: Manage a flexible and elastic Data Center with Oracle VM Manager Frederic Michiar shares a list of Oracle VM resources. (tags: otn oracle virtualization) Mona Rakibe: BAM Data Control in multiple ADF Faces Components "When two or more ADF Faces components must display the same data, and are bound to the same Oracle BAM data control definition, we have to make sure that we wrap each ADF Faces component in an ADF task flow, and set the Data Control Scope to isolated. " Mona Rakibe shows you how. (tags: oracle otn soa bam adf) Martin Widlake: Performance Tipping Points Martin Widlake offers "a nice example of a performance tipping point. This is where Everything is OK until you reach a point where it all quickly cascades to Not OK." (tags: oracle otn database architecture performance) Steve Chan: EBS Techstack Sessions at OAUG/Collaborate 2010 Steve Chan shares a list of Collaborate 2010 sessions featuring Oracle E-Business Suite Applications Technology Group staffers. (tags: oracle otn collaborate2010 ebs) @ORACLENERD: Developing in APEX Oracle ACE Chet Justice counts the ways... (tags: otn oracle oracleace apex) @bex: Almost Time For IOUG Collaborate 2010 Oracle ACE Director Bex Huff shares details on his Collaborate 2010 presentation, "The Top 10 Things Oracle UCM Customers Need To Know About WebLogic:" (tags: oracle otn oracleace collaborate2010 weblogic ucm enterprise2.0)

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• Is this a secure solution for RESTful authentication?

  - by Chad Johnson

  I need to quickly implement a RESTful authentication system for my JavaScript application to use. I think I understand how it should work, but I just want to double check. Here's what I'm thinking -- what do you guys think? Database schema users id : integer first_name : varchar(50) last_name : varchar(50) password : varchar(32) (MD5 hashed) etc. user_authentications id : integer user_id : integer auth_token : varchar(32) (AES encrypted, with keys outside database) access_token : varchar(32) (AES encrypted, with keys outside database) active : boolean Steps The following happens over SSL. I'm using Sinatra for the API. JavaScript requests authentication via POST to /users/auth/token. The /users/auth/token API method generates an auth_token hash, creates a record in user_authentications, and returns auth_token. JavaScript hashes the user's password and then salts it with auth_token -- SHA(access_token + MD5(password)) POST the user's username and hashed+salted password to /users/auth/authenticate. The /users/auth/authenticate API method will verify that SHA(AES.decrypt(access_token) + user.password) == what was received via POST. The /users/auth/authenticate will generate, AES encrypt, store, and return an access token if verification is successful; otherwise, it will return 401 Unauthorized. For any future requests against the API, JavaScript will include access_token, and the API will find the user account based on that.

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• How to get better video quality in Lync?

  - by sinned

  I want to use a ConferenceCam from Logitech to stream talks live via Lync. When I view the RAW webcam image via VLC, the quality is very good (but the latency is high because of buffering). However, when I stream it using Lync, the video gets blurry. Is there a way to ensure QoS in Lync or otherwise improve the video quality to (near-)native? I would rather have some dropped frames than a lower resolution where I can't read the slides. In my setup, I use Lync with an Office365-E3 contract, so I have no Lync-Server in my network. I thought about replacing Lync completely with VLC, but I first want to try Lync because VLC will probably cause firewall issues. Also, I haven't looked up the VLC parameters for less buffering, faster encoding, a bit lower resolution (natively it's more than HD) and streaming.

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• setup Mac Book Wifi interface as Wifi hotspot using specific DHCP option

  - by srjohnhuang

  I want to using my Mac Book as an access point. Besides that I also need to configure its DHCP server to not provide DNS info. For example, Mac Books AP's ssid is "MacBookHotspot". While my iPhone connected to "MacBookHotspot", I want the Wifi info displayed my iPhone would be looked like: IP ADDRESS DHCP(tab) IP Address 192.168.0.1 Subnet Mask 255.255.255.0 Router 192.168.0.254 DNS Search Domains Client ID (key point: DNS filed is blank) Does anyone have any good suggestion? Thanks!

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• Oracle Insurance Gets Innovative with Insurance Business Intelligence

  - by nicole.bruns(at)oracle.com

  Oracle Insurance announced yesterday the availability of Oracle Insurance Insight 7.0, an insurance-specific data warehouse and business intelligence (BI) system that transforms the traditional approach to BI by involving business users in the creation and maintenance."Rapid access to business intelligence is essential to compete and thrive in today's insurance industry," said Srini Venkatasantham, vice president, Product Strategy, Oracle Insurance. "The adaptive data modeling approach of Oracle Insurance Insight 7.0, combined with the insurance-specific data model, offers global insurance companies a faster, easier way to get the intelligence they need to make better-informed business decisions." New Features in Oracle Insurance 7.0 include:"Adaptive Data Modeling" via the new warehouse palette: Gives business users the power to configure lines of business via an easy-to-use warehouse palette tool. Oracle Insurance Insight then automatically creates data warehouse elements - such as line-specific database structures and extract-transform-load (ETL) processes -speeding up time-to-value for BI initiatives. Out-of-the-box insurance models or create-from-scratch option: Includes pre-built content and interfaces for six Property and Casualty (P&C) lines. Additionally, insurers can use the warehouse palette to deploy any and all P&C or General Insurance lines of business from scratch, helping insurers support operations in any country.Leverages Oracle technologies: In addition to Oracle Business Intelligence Enterprise Edition, the solution includes Oracle Database 11g as well as Oracle Data Integrator Enterprise Edition 11g, which delivers Extract, Load and Transform (E-L-T) architecture and eliminates the need for a separate transformation server. Additionally, the expanded Oracle technology infrastructure enables support for Oracle Exadata. Martina Conlon, a Principal with Novarica's Insurance practice, and author of Business Intelligence in Insurance: Current State, Challenges, and Expectations says, "The need for continued investment by insurers in business intelligence capabilities is widely understood, and the industry is acting. Arming the business intelligence implementation with predefined insurance specific content, and flexible and configurable technology will get these projects up and running faster."Learn moreTo see a demo of the Oracle Insurance Insight system, click hereTo read the press announcement, click here

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• Accessing IPv6 router interface from a minimal Fedora installation?

  - by Zack

  I've recently installed Fedora 16 and am trying to set up a simple apache server. The only problem I've run into so far is that I'm unable to access my router's web interface from any box on my network. It assigns addresses via dhcp, and the router always responds to a ping. The server is also picking up an IP from the router on the proper subnet. Now, all I really need to do is forward a port, however I am receiving "Unable to connect" through the web interfaces and "connection refused" via telnet. What are my options, and how might I go about troubleshooting this? Will I need the server's ip to be static in order to change these settings? The router is a "Netopia" model, if that helps.

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• Always a path to the internet even in Windows SBS is off

  - by Mark

  Hello all, is it possible to have a configuration in a Windows 2003 SBS environment where in the event that the SBS box crashed/turned off/ or is being worked on that there can still exist a path to the internet for domain users and visitors to still use? I would like to have the standalone router issue DHCP IPs. The primary DNS would point to the SBS, the secondary wouuld point to the ISP DNS Server. My theory was that if someone was using the internet and the SBS box went down they wouldn't be able to access the network shares but still be able to use the internet. (We are moving everything into the clouds with Google Apps Non-Profit) Does this seem like a reasonable configuration? Or are they're pitfalls that I will fall into? Thanks Mark

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• Logging Bounced messages to a Database (Postfix with virtual domains/users)

  - by Gurunandan

  We have a postfix installation with a couple of virtual domains each with virtual users. These domains and users are mapped using a mysql database. I have been until now tracking bounces by parsing the postfix log file. I suspect there must be better and more efficient ways of doing this. I thought of three but I am not sure what is best: Write a Postfix content filter that logs the bounce and throws away the mail Use procmail - but I am not sure how procmail would work with virtual users who have no $HOME defined Write a script that POPs mail from mailboxes; parses and logs them and deletes the bounced email I would appreciate advise on which would be best from a maintenance point of view and efficient from conserving server resources point of view. Thanks

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• www a-record vs cname-record

  - by Sorin Buturugeanu

  Hi! I have a website that I will be hosting DNS for (testing purposes at first and then it will have some limited traffic). I have set up DNS so that site.tld has an A record to the actual IP but I don't know what to do about www.site.tld. Both site.tld and www.site.tld will point to the same server / application so my logic tells me to add a cname record so that www.site.tld becomes an alias for site.tld, BUT, I've been checking my settings with intodns.com and if I only add a CNAME for the www.site.tld it gives me the following error: ERROR: I could not get any A records for www.cexa.ro! (the error clears once I do an A record for www.site.tld to point to the actual IP) I don't know if there is a "rule" that "www." should always be an A record even though it's actually pointing to the same IP / application. Thanks for helping me understand this!

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• Converting 2D coordinates from multiple viewpoints into 3D coordinates

  - by Kirk Smith

  Here's the situation. I've got a set of 2D coordinates that specify a point on an image. These 2D coordinates relate to an event that happened in a 3D space (video game). I have 5 images with the same event point on it, so I have 5 sets of 2D coordinates for a single 3D coordinate. I've tried everything I can think to translate these 2D coordinates into 3D coordinates, but the math just escapes me. I have a good estimate of the coordinates from which each image was taken, they're not perfect but they're close. I tried simplifying this and opening up Cinema 4D, a 3D modeling application. I placed 5 cameras at the coordinates where the pictures were taken and lined up the pictures with the event points for each one and tried to find a link, but nothing was forthcoming. I know it's a math question, but like I said, I just can't get it. I took physics in high school 6 years ago, but we didn't deal with a whole lot of this sort of thing. Any help will be very much appreciated, I've been thinking on it for quite a while and I just can't come up with anything.

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• Two group of name server records, where to put them?

  - by sazary

  I've registered my domain by a registrar that has very poor DNS management tools. I need to point from my registrar to another third-party DNS manager, and then from there point to the name servers of my host, along with some other DNS records (such as SPF records). What I've done now is this: I've given the address of the name servers of my third-party DNS manager to the DNS manager of my registrar, and then I've given the address of the name servers of my host to the third-party DNS manager, along with some SPF and MX records. Is this work correct? Or should I add the NS address of my host to my registrar DNS manager too? The problem is that my domain doesn't resolve to my host, and I see some strange records in some DNS servers around the world that I have not set!

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• Should I remove all unmanged switches from my network?

  - by IMAbev

  I have a office network with approx 150 devices (computers/printers/ip phones). Almost all of the end point devices have straight run Cat5e from my Hp switches directly to the device. IP phones for each end user sit between the hp switch and computer. (hp switch - in to phone out of phone in to computer) While I have gotten rid of most of them, I still have a couple linksys unmanaged switches that split off to 2 or more devices. I have heard various reasons for removing these switches but not entirely sure if it actually degrades the network. I agree that eliminating these switches certainly cleans up the network from a management standpoint. Are these unmanaged switches bad for my network? Is there a clear advantage to having 'home run' cable runs to each of my end point devices?

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• D-Link DIR-300 slows down / loses network

  - by basic6

  Hi there, there are 2 buildings (A and B). In bldg A is an open WLAN (which I'm allowed to use btw). In bldg B is a computer that I want to connect to that network. So I flashed an old D-Link DIR-300 AP with DD-WRT, mounted it to the wall (bldg B) near a window, attached a 13 dBi directional antenna (pointing to bldg A) and configured it as AP client in that wireless network. Then there's another AP, connected to the D-Link AP, acting as standard access point, which the computer is connected to. That's basically working so far, but: Every now and then the connection is lost. Not the connection between the computer and the D-Link (I can access the DD-WRT admin page normally) or the connection between the D-Link and the WLAN (in Status - Wireless it says it's still connected to the network), but when I want to access a web page (which only works if I'm connected to the wireless network from bldg A), my Firefox keeps "Looking for" (name resolution) without finding anything. When I reset the D-Link (power off, power on) in this situation, after some moments, everything's working fine again (Internet access). I've no idea why this is happening, but usually it's at most every few weeks (most times when nobody was using the computer, so no traffic). Compared to the connection speed when I connect directly to the WLAN in bldg A (Laptop), the speed in bldg B is rather slow, but I have the impression that this difference is worse in the last few days. A few minutes ago, I got 582 KB/s down and 911 KB/s up in bldg A (directly/laptop) and 84 KB/s down and 9 KB/s up in bldg B. The speed in bldg B used to be way higher (I remember 200 KB/s up) while the actual network speed in bldg A was lower than it is now (close to those 200). I'm aware that the wireless connection between those buildings should slow things down, but I'm wondering why this difference has become that extreme. Thanks for any tips... Update: I currently want to upload a large file (1.5 GB) via FTP (FileZilla). Since that caused the D-Link to disconnect (as described in first post), I took my laptop to bldg A, connected directly to the original WLAN (bypassing my D-Link) and tried the same upload. Guess what - same issue: At some point the connection is dead (at this point I would have reset my D-Link if I was connected to it). Just as the D-Link, my laptop is still connected, but not even name resolution is working ("Looking for..." in Firefox). After reconnecting, it's working again. Maybe my D-Link isn't the problem at all...

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• How can I create (or do I even need to create) an alias of a DNS MX record?

  - by AKWF

  I am in the process of moving my DNS records from Network Solutions to the Amazon Route 53 service. While I know and understand a little about the basic kinds of records, I am stumped on how to create the record that will point to the MX record on Network Solutions (if I'm even saying that right). On Network Solutions I have this: Mail Servers (MX Records) Note: Mail Servers are listed in rank order myapp.net Add Sub-Domain MXMailServer(Preference) TTL inbound.myapp.net.netsolmail.net.(10) 7200 Network Solutions E-mail I have read that the payload for an MX record state that it must point to an existing A record in the DNS. Yet in the example above, that inbound.myapp... record only has the words "Network Solutions E-mail" next to it. Our email is hosted at Network Solutions. I have already created the CNAME records that look like this: mail.myapp.net 7200 mail.mycarparts.net.netsolmail.net. smtp.myapp.net 7100 smtp.mycarparts.net.netsolmail.net. Since I am only using Amazon as the DNS, do I even need to do anything with that MX record? I appreciate your help, I googled and researched this before I posted, this is my first post on webmasters although I've been on SO for a few years.

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• Shareing two internet connections on my laptop running Windows XP

  - by ashwnacharya

  I have two internet connections, one is internet via our organization's corporate LAN network, and the other one is mobile broadband via a USB modem Is there anyway I can share internet connections and use them simultaneously? I want to use the corporate LAN network for normal browsing and connecting my email client, and I want to use the USB modem for establishing a VPN connection. Will I be able to maintain both the connections simultaneously? Can I have parallel downloads, one using our corporate network, and the other one using the mobile broadband? Will I be able to switch my browser between these two connections? My laptop runs Windows XP Service Pack 2.

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• Glenn Fiedler's fixed timestep with fake threads

  - by kaoD

  I've implemented Glenn Fiedler's Fix Your Timestep! quite a few times in single-threaded games. Now I'm facing a different situation: I'm trying to do this in JavaScript. I know JS is single-threaded, but I plan on using requestAnimationFrame for the rendering part. This leaves me with two independent fake threads: simulation and rendering (I suppose requestAnimationFrame isn't really threaded, is it? I don't think so, it would BREAK JS.) Timing in these threads is independent too: dt for simulation and render is not the same. If I'm not mistaken, simulation should be up to Fiedler's while loop end. After the while loop, accumulator < dt so I'm left with some unspent time (dt) in the simulation thread. The problem comes in the draw/interpolation phase: const double alpha = accumulator / dt; State state = currentState*alpha + previousState * ( 1.0 - alpha ); render( state ); In my render callback, I have the current timestamp to which I can subtract the last-simulated-in-physics-timestamp to have a dt for the current frame. Should I just forget about this dt and draw using the physics thread's dt? It seems weird, since, well, I want to interpolate for the unspent time between simulation and render too, right? Of course, I want simulation and rendering to be completely independent, but I can't get around the fact that in Glenn's implementation the renderer produces time and the simulation consumes it in discrete dt sized chunks. A similar question was asked in Semi Fixed-timestep ported to javascript but the question doesn't really get to the point, and answers there point to removing physics from the render thread (which is what I'm trying to do) or just keeping physics in the render callback too (which is what I'm trying to avoid.)

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• Can't login into Fedora 14 (XFCE) desktop. For the second time.

  - by bubba88

  Hello. I'm experiencing a problem with my Fedora 14 XFCE spin, which doesn't seem to let me pass the login screen: I enter my password for my user record, authentication passes (no 'Authentication Failure' message, which was when I tried to login as 'root' without root login enabled), and the screen becomes black (command line) for a couple of seconds and (voila!) my login screen emerges again. I did nothing to cause that, it just suddenly logged me out when I was editing window manager settings via XFCE's built-in GUI utility (choosing window decorations style, from the listbox on the left) For the first time, I had to boot from live CD and do a fresh install, but I don't really want to do that again :) Is there some way to repair this (maybe login via command line and reset window manager settings, I don't know really)? Thank you very much in advance!

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• Mobile Connections in Las Vegas April 17-21

  - by Wallym

  I'll be speaking at Mobile Connections in Las Vegas.  The event is April 17-21.  The event is a cross platform mobile event.  There will be sessions on iOS, Android, WP7, Blackberry, and cross platform tools.  The sessions I am speaking on are:Introduction to Android via MonoDroid:This session will introduce writing native applications geared for the Android Platform based on .NET/C#/Mono. We’ll examine the overall architecture of MonoDroid, discuss how it integrates with Visual Studio, debug with MonoDroid, and look at a couple of example apps written with MonoDroid. This session is targeted to the .NET developer who wants to move to the Android mobile platform. While the session will be introductory for the Android platform, it will be intermediate/expert for those on the .NET platform.Web Development with HTML5 to target Android, iOS, iPadThis session will examine the features of the mobile browser, and how developers can leverage it to build applications that target mobile devices. This session is for developers looking to target Android, iPhone, WebKit based devices, and other devices through the mobile web with the same application code, development managers looking to Android, iPhone, WebKit based devices, and other devices through the mobile web with the same application code, and developers and development managers looking to build mobile web apps for devices that look like native apps. Attendees will be able to immediately begin building web applications that target the Android and iPhone platforms. The benefits of this approach are: Easy cross platform development No requirement to learn Objective-C/Xcode or Java/Eclipse Applications are immediately upgradeable. There is no requirement to go through the Marketplace or Appstore of either platform. Web developers are easier to find than Objective-C, Blackberry, WebOS, or Java programmerYou can register for the event and get $100 off via this link.

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• OpenVPN Cloud for Network monitoring

  - by mezgani

  I'm working on a supervision project based on OpenVPN, a good way to send some network traffic through a secure channel to office from there out to the Internet. On office i have an OpenVPN server installed and i need to monitor all branches servers that are behind firewalls. I know that the point to point solution is very easy so we may only install OpenVPN client on node that i need to monitor. In the fact, is there any other issue that could help to supervise all branches DMZ network, without installing the client on each machines.

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• Vim Stuck In Insert Mode

  - by Levi Hackwith

  I've been using Vim for several months now via my web host (they allow putty access). All of a sudden, the escape key has become unresponsive. I cannot exist insert or any other mode by simply hitting escape. I have to hit F1 which brings up the help in vim and kicks me into command mode. I'm most certain that my escape key on my keyboard is functioning fine since all of my windows shortcuts that use the escape key operate normally. I know this is a ridiculous question and I'm certain there's a lot more to look into regarding a solution. What I really need is a solid lead as to where to start looking. Things that might help: I'm using vim via putty I'm logging in using jailshell I'm not root

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• Como instalar Windows (x86/x64) sobre Linux (Ubuntu)

  - by yorrany

  I installed Ubuntu edition (10.04) on my windows 7, completely eliminating it to the original installation. After I was forced to reverse the process, but could not find tools or explanations of how to do it. To clarify the equipment, it is: a netbook, acer, no optical drive cd / dvd, the process should be fully via USB. I hope I was clear enough, count on the support of you. Thank you. -- Instalei a edição Ubuntu (10.04) sobre meu Windows 7, eliminando completamente a a instalação original. Depois fui forçado à reverter o processo, mas não encontrei ferramentas ou explicações de como fazê-lo. Para esclarecer sobre o equipamento, trata-se de: um netbook, acer, sem leitor óptico de cd/dvd, o processo deverá ser totalmente via USB. Espero ter sido bastante claro, conto com o suporte de vocês. Muito obrigado.

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• Dell PR03X port replicator and DisplayPort to DVI adapter not detecting second monitor

  - by yothenberg

  I have a Dell M4400 connected to a PR03X port replicator/docking station. I use the DVI port to connect it to a first Dell 2208WFP monitor and I'm trying to use a DisplayPort-to-DVI adapter to connect it to a second Dell 2208WFP monitor. The second monitor, connected via the DisplayPort-to-DVI adapter immediately goes into sleep mode and the laptop doesn't detect it. What is really weird is that it did detect it the first time I plugged it in but after I unplugged the monitor and plugged it back in it stopped working. I swapped the monitors round and it detected them both but after unplugging the monitor connected via the DisplayPort-to-DVI and plugging it in again it stopped working. Both monitors work if plugged in directly to the DVI port. Is there some way to force re-detection? Any ideas?

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• Having XP VM use my host OSX ssh tunnel to connect to a remote site?

  - by Manachi

  I am using Mac OSX and have Windows XP running on VMWare Fusion. I'm creating an ssh tunnel from OSX to a remote server, and then trying to have Windows XP use that tunnel (I actually use a program called Proxifier on XP to filter my XP MS SQL Server traffic through that tunnel) Note that I can successfully create an ssh tunnel (on port 9333) from the XP putty to the remote host, and have SQL Server Proxify through that tunnel and it all works correctly. However when I try to set up the tunnel in OSX, and have Proxifier in XP point to the OSX tunnel instead of localhost, it doesn't seem to connect. Here is the OSX command i'm using to create the tunnel: ssh -i /my/key -p 9001 -D 9333 -g me@remotehostname Then I set my XP proxifier to point to macosxhostname:9333 (instead of the previous localhost:9333 which worked corrently when using putty) Any suggestions on what I may have missed? My XP firewall is turned off while setting this up.

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• How do I manage the technical debate over WCF vs. Web API?

  - by Saeed Neamati

  I'm managing a team of like 15 developers now, and we are stuck at a point on choosing the technology, where the team is broken into two completely opposite teams, debating over usage of WCF vs. Web API. Team A which supports usage of Web API, brings forward these reasons: Web API is just the modern way of writing services (Wikipedia) WCF is an overhead for HTTP. It's a solution for TCP, and Net Pipes, and other protocols WCF models are not POCO, because of [DataContract] & [DataMember] and those attributes SOAP is not as readable and handy as JSON SOAP is an overhead for network compared to JSON (transport over HTTP) No method overloading Team B which supports the usage of WCF, says: WCF supports multiple protocols (via configuration) WCF supports distributed transactions Many good examples and success stories exist for WCF (while Web API is still young) Duplex is excellent for two-way communication This debate is continuing, and I don't know what to do now. Personally, I think that we should use a tool only for its right place of usage. In other words, we'd better use Web API, if we want to expose a service over HTTP, but use WCF when it comes to TCP and Duplex. By searching the Internet, we can't get to a solid result. Many posts exist for supporting WCF, but on the contrary we also find people complaint about it. I know that the nature of this question might sound arguable, but we need some good hints to decide. We're stuck at a point where choosing a technology by chance might make us regret it later. We want to choose with open eyes. Our usage would be mostly for web, and we would expose our services over HTTP. In some cases (say 5 to 10 percent) we might need distributed transactions though. What should I do now? How do I manage this debate in a constructive way?

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• Necesity of ModSecurity if Apache is behind Nginx

  - by Saif Bechan

  I have my Apache installed behind Nginx. So every request that comes in is first handeled by Nginx. If there is dynamic content needed the request is send to Apache which listens on port 8080. Pretty basic reverse proxy setup. Now with this setup the first entry point is Nginx. Is it still needed to install ModSecurity to protect Apache against unwanted request. Or should I just focus on protecting Nginx as this is the first entry point. All suggestions are welcome.

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