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• What is the value in hiding the details through abstractions? Isn't there value in transparency?

  - by user606723

  Background I am not a big fan of abstraction. I will admit that one can benefit from adaptability, portability and re-usability of interfaces etc. There is real benefit there, and I don't wish to question that, so let's ignore it. There is the other major "benefit" of abstraction, which is to hide implementation logic and details from users of this abstraction. The argument is that you don't need to know the details, and that one should concentrate on their own logic at this point. Makes sense in theory. However, whenever I've been maintaining large enterprise applications, I always need to know more details. It becomes a huge hassle digging deeper and deeper into the abstraction at every turn just to find out exactly what something does; i.e. having to do "open declaration" about 12 times before finding the stored procedure used. This 'hide the details' mentality seems to just get in the way. I'm always wishing for more transparent interfaces and less abstraction. I can read high level source code and know what it does, but I'll never know how it does it, when how it does it, is what I really need to know. What's going on here? Has every system I've ever worked on just been badly designed (from this perspective at least)? My philosophy When I develop software, I feel like I try to follow a philosophy I feel is closely related to the ArchLinux philosophy: Arch Linux retains the inherent complexities of a GNU/Linux system, while keeping them well organized and transparent. Arch Linux developers and users believe that trying to hide the complexities of a system actually results in an even more complex system, and is therefore to be avoided. And therefore, I never try to hide complexity of my software behind abstraction layers. I try to abuse abstraction, not become a slave to it. Question at heart Is there real value in hiding the details? Aren't we sacrificing transparency? Isn't this transparency valuable?

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• How to gain admin privileges on D-Link router if my isp is not allowing me to do so?

  - by Fischer

  So I switched to new ISP yesterday, they gave me a D-Link router, can't use my old router. I want to change the wireless password, went to 192.168.1.1, I can login with the the username and password user user, but not as admin. On the catalog it says that the default username and password are admin admin, tried that didn't work. Tried admin and no pass, tried many combinations, none worked. I asked some other users and they said that the isp is blocking the users from logging in as admins, and blocking the reset button, and said that there's a hack where you do something like: cmd telnet "router ip" and do something like dumpcfg. Could you please give a better explanation on how to gain admin privileges on your own router if your isp is not letting you do so by default?

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• Defense Manpower Data Center Wins Award for Excellence in the Workforce

  - by Peggy Chen

  The Defense Manpower Data Center milConnect website recently won the 2012 Excellence.gov Award for Excellence in the Workforce. Defense Manpower Data Center milConnect is a centralized, online resource that provides military service members (active and retired) and their families (over 42 million in total) quick access to their profile, health care enrollments, benefits, and other military-related topics. An easy to use, safe and secure website, milConnect also provides service members with convenient access their personnel and service-related information. The self-service website allow users to quickly and easily find and, where applicable, update their information in the Defense Eligibility Reporting System (DEERS) and milConnect transmits information to and from one reliable source safely and securely.  The Defense Manpower Data Center (DMDC) maintains the largest, most comprehensive central repository of personnel, manpower, casualty, pay, entitlement, personnel security, person identity and attributes, survey, testing, training, and financial data in the Department of Defense (DoD).  This is one of the largest systems of record in the world. milConnect had the challenge of modernizing the user experience for over 42 million users. With records in over 22 applications and 25 interfaces in hundreds of existing systems, milConnect needed to reduce the complexity of multiple authentication sources as well as consolidating access to existing systems with sensitive information. It accomplished this using a service-orientated architecture, enterprise security and access and identity management for self-service access on a massive scale. By providing 24x7x365 secure access and handling over 5 million transactions daily, not only has milConnect, built on Oracle WebCenter, streamlined and improved the customer experience for military personnel and families. it has also done so while cutting costs, allowing self-service access, and promoting electronic government. Congrats to Defense Manpower Data Center and milConnect! 

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• Creating windows links on Linux?

  - by Bart B

  I'm running a SAMBA file store for our Windows users, and I'd like to automatically generate windows LNK files linking to other network shares that the user needs access to. I've done quite a bit of googling and I can't find a way of creating windows links on Linux, or through Perl. I did find a perl module that looked promising in CPAN, but it will only run on Windows unfortunately. If it's not possible to create .LNK files, perhaps there is an alternative solution people can suggest to allow the users to click on a file in one SAMBA store to be linked to a different SAMBA share? Thanks, Bart.

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• July, the 31 Days of SQL Server DMO’s – Day 26 (sys.dm_db_log_space_usage)

  - by Tamarick Hill

  The sys.dm_db_log_space_usage DMV is a new DMV for SQL Server 2012. It returns Total Size, Used Size, and Used Percent size for a transaction log file of a given database. To illustrate this DMV, I will query the DMV against my AdventureWorks2012 database. SELECT * FROM sys.dm_db_log_space_usage As mentioned above, the result set gives us the total size of the transaction log in bytes, the used size of the log in bytes, and the percent of the log that has been used. This is a very simplistic DMV but returns valuable information. Being able to detect when a transaction log is close to being full is always a valuable thing to alert on, and this DMV just provided an additional method for acquiring the necessary information. Follow me on Twitter @PrimeTimeDBA

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• Oracle VM Slides and Replay

  - by Alex Blyth

  Thanks everyone for attending the webcast on "Oracle VM and Virtualisation" last week. I know I got some useful info out of the session and on behalf of all those who attended I'll say Thank You to Dean Samuels for spending some time talking to us.Slides are available here Oracle VM - 28/04/2010 View more presentations from Oracle Australia. You can download the replay here. Next week's session is on Oracle Database Security and will cover briefly all the big guns like Transparent Data Encryption, Database Vault, Audit Vault, Flashback Data Archive as well as touching on some of the features that are so often skipped over. You can enroll for this session here. Thanks again Cheers Alex

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• How do you cache web pages with a personalized header using caching reverse proxy such as Squid, Var

  - by Continuation

  Pretty much every page of my website is dynamically generated. However they don't change that frequently (kinda similar to a forum page). So I'd like to cache them using a caching reverse proxy such as Squid, varnish or Nginx. The problem is that for my logged-in users, each of them will see a personalized header saying "Welcome John Doe. Logout" on the upper right corner of the page (just like serverfault). While users who aren't logged in will see a header that says "Login" instead. So basically even though every user will see the same page in general, they all slightly different version due to that personalized header. Is there any way so that I can cache the "main" part of the page and serve it from cache while generate the personalized header dynamically for each individual user? This must be a very common problem. How is it solved in general?

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• Windows Intune, Cloud Desktop management

  - by David Nudelman

  As a part of Microsoft Cloud computing strategy, Windows Intune beta was released today. Here’s a quick overview of what customers and IT consultants can do with the cloud service component of Windows Intune: Manage PCs through web-based console: Windows Intune provides a web-based console for IT to administrate their PCs. Administrators can manage PCs from anywhere. Manage updates: Administrators can centrally manage the deployment of Microsoft updates and service packs to all PCs. Protection from malware: Windows Intune helps protect PCs from the latest threats with malware protection built on the Microsoft Malware Protection Engine that you can manage through the Web-based console. Proactively monitor PCs: Receive alerts on updates and threats so that you can proactively identify and resolve problems with your PCs—before it impacts end users and your business. Provide remote assistance: Resolve PC issues, regardless of where you or your users are located, with remote assistance. Track hardware and software inventory: Track hardware and software assets used in your business to efficiently manage your assets, licenses, and compliance. Set security policies: Centrally manage update, firewall, and malware protection policies, even on remote machines outside the corporate network. And here a quick video about Windows Intune For support and questions go to : TechNet Forums for Intune Regards, David Nudelman

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• Do or can robots cause considerable performance issues?

  - by Anicho

  So the question in the title is exactly what I am trying to find out. My case is: At work we are in a discussion with team members who seem to think bots will cause us problems relating to performance when running on our services website. Out setup: Lets say I have site www.mysite.co.uk this is a shop window to our online services which sit on www.mysiteonline.co.uk. When people search in google for mysite they see mysiteonline.co.uk as well as mysite.co.uk. Cases against stopping bots crawling: We don't store gb's of data publicly available on the web Most friendly bots, if they were to cause issues would have done so already In our instance the bots can't crawl the site because it requires username & password Stopping bots with robot .txt causes an issue with seo (ref.1) If it was a malicious bot, it would ignore robot.txt or meta tags anyway Ref 1. If we were to block mysiteonline.co.uk from having robots crawl this will affect seo rankings and make it inconvenient for users who actively search for mysite to find mysiteonline. Which we can prove is the case for a good portion of our users.

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• Examples of permission-based authorization systems in .Net?

  - by Rachel

  I'm trying to figure out how to do roles/permissions in our application, and I am wondering if anyone knows of a good place to get a list of different permission-based authorization systems (preferably with code samples) and perhaps a list of pros/cons for each method. I've seen examples using simple dictionaries, custom attributes, claims-based authorization, and custom frameworks, but I can't find a simple explanation of when to use one over another and what the pros/cons are to using each method. (I'm sure there's other ways than the ones I've listed....) I have never done anything complex with permissions/authorization before, so all of this seems a little overwhelming to me and I'm having trouble figuring out what what is useful information that I can use and what isn't. What I DO know is that this is for a Windows environment using C#/WPF and WCF services. Some permission checks are done on the WCF service and some on the client. Some are business rules, some are authorization checks, and others are UI-related (such as what forms a user can see). They can be very generic like boolean or numeric values, or they can be more complex such as a range of values or a list of database items to be checked/unchecked. Permissions can be set on the group-level, user-level, branch-level, or a custom level, so I do not want to use role-based authorization. Users can be in multiple groups, and users with the appropriate authorization are in charge of creating/maintaining these groups. It is not uncommon for new groups to be created, so they can't be hard-coded.

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• Since a few days, Dropbox stopped syncing

  - by Fabio

  Theres a new problem with nautilus-dropbox and is the worst for a service like Dropbox: stopped syncing and their tech support don't believe their users. The problem is: start dropbox it downloads index creates folders start to download files stop downloading files or the speed is like 0.3k/seg even deleting everything doesn't work, even syncing a single folder with a few files, not even configuring a different limit speed or let all your bandwith, nothing works for me and i have found many users with the same problem. it's strange, i have two computers with ubuntu 14.04 and one with windows 7, and in one of the linux machines it works fine, but not in the other one. Both of them are x64. The answers from the tech support starts with "delete everything and reinstall" to "you may be blocking port 443", yeah, sure (and if i do that half of internet dissapears, idiot), but nothing works. Someone has some idea? i cant find any log file (at least a text log file like in /var/log) to understand what is dropbox doing and what is not working. PS: sorry for my "english", is not my language Examples: dropbox slow on ubuntu 14.04 Dropbox does not sync on ubuntu 14.04 Dropbox Status (in spanish but is the same thing) fabio@canopus:~$ dropbox status Sincronizando (Quedan 330 archivos., Faltan 9 días.) Descargando 330 archivos... (0,3 KB/s, Faltan 9 días.) 9 days for 330 files / 100Mb

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• Windows 7 User / Documents and Settings folders

  - by Kip

  Yo, I have a machine - Windows 7, nothing remarkable about the install but i have multiple drives in the machine. I have a c:\users\username folder which seems to be current and is the one that all windows properties point to. However, i also have a f:\documents and settings\username folder (which was hidden) which is also current and up to date. If i edit anything from either, they seem to "replicate" or update each other ie if i rename an icon on my desktop, it renames it in c:\users\username\desktop and f:\documents and settings\username\desktop. Likewise if i edit directly in one of those folders, it does the same to the other. Any one got any ideas what might cause this? Problem i have is that I need to remove the f drive all together! Thanks in advance

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• Exchange 2007: Auto reply message to senders (server side)

  - by Mestika

  I’ve a need to create an auto-reply for some of the users in my organization where, when a person sends an E-mail to e.g. [email protected] is faced with an automatically auto-reply with some message “closed during the holidays. We are back at… etc. etc. etc.”. I’ve tried to create a Transport Rule on our Exchange server but the only option I can find in the actions-window is to reply with a “Bounce message to sender with enhanced status code” but I guess that is not the precise action I’m looking for. How can I set up a server-side auto-reply, apply it to only a fixed number of users in my organization and create a message to the senders (which is outside the organization)?

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• Throttle connections to web service if load gets too high?

  - by Joseph Turian

  I have a web site that communicates via XMLRPC with an XMLRPC server web service. (The web service is written in Python using xmlrpclib.) I believe that xmlrpclib will block while it is handling one request. So if there are three users with an xmlrpclib request ahead of you, your response takes four times as long. How do I handle it if I receive too many XMLRPC requests and the web service gets bogged down and has slow response time? If I am getting slashdotted, my preferred behavior is that the first users get good response times and everyone else is told to come back later. I think this is superior to giving everyone terrible response times. How do I create this behavior? Is this called load-balancing? I am not actually balancing though, until I have multiple servers.

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• Assembling Word Doc using Data from Excel- MS Office 2010

  - by Sascha

  I have a questionnaire that users complete. It is in Excel. After users complete the questionnaire I would like to be able to generate a Word document that contains their answers. For example "The answer to your question was [answer from Excel Questionnaire cell A49 ]" I have seen that this is possible with Sharepoint. However, I don't have Sharepoint. I am working on MS Office 2010. I also have visual Studio Express 2010. What is the best way to achieve the above, pretty please? Thanks.

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• DNS error only in IE

  - by Le_Quack

  Our Intranet page has stopped working on some machines/some user accounts. The error I am getting points to a DNS issue but If I ping the site from the command line the it responds fine. The error I'm gettting on IE is Error: The web filter could not find the address for the requested site Why are you seeing this: The system is unable too determine the IP address of intranet.example.com I'm not quite sure why it mentions the web filter as there is a proxy exception for the intranet page and if I run a trace route it doesn't go via the web proxy (filtering system). Finally it isn't affecting everyone, just random users, also it doesn't affect the random users on all the client machines they use. I have one user where it happens on any client they log onto where most its just certian clients. It's even "fixed" itself for a few peoples. EDIT: hey Mikey thanks for the fast response. Proxies are correct and automatic configuration is off (both via GPO)

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• Enterprise user management

  - by Eduardo

  I am looking for an enterprise user management system that meets these requirements: Delegated user administration: The group manager should be able to grant access to his supervised employees (without having to contact any administrator either to grant access or maybe create users). A group manager should be able to create other groups and restrict any permission he already has where he can add supervised employees. If a manager removes access to a supervised group, then all the subgroups will also lose access. Web based User Interface. LDAP interface to query users and groups (or may not exist at all if it is integrated in a single application). Do you know if there are any system that meet these requirements?

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• squid3 auth thru samba using ntlm to AD doesn't work

  - by derty

  some users here are spending to much time exploring the WWW. So big boss whats to get this under control. We use a squid3 just for some security reason and chace benefits. and now i'm trying to set up a new proxy on a different server (Debian 6) Permissions are defined in AC and the squid3 should get the auth thru samba/winbind by using the ntlm protocol. but i'll get all the time Access, denited. it only works by using LDAP but thats not the way i need it. here some log and confs squid access.log 1326878095.784 1 192.168.15.27 TCP_DENIED/407 4049 GET http://at.msn.com/? -NONE/- text/html 1326878095.791 1 192.168.15.27 TCP_DENIED/407 4294 GET http://at.msn.com/? - NONE/- text/html 1326878095.803 9 192.168.15.27 TCP_DENIED/403 4028 GET http://at.msn.com/? kavan NONE/- text/html 1326878095.848 0 192.168.15.27 TCP_DENIED/403 3881 GET http://www.squid-cache.org/Artwork/SN.png kavan NONE/- text/html 1326878100.279 0 192.168.15.27 TCP_DENIED/403 3735 GET http://www.google.at/ kavan NONE/- text/html 1326878100.296 0 192.168.15.27 TCP_DENIED/403 3870 GET http://www.squid-cache.org/Artwork/SN.png kavan NONE/- text/html 1326878155.700 0 192.168.15.27 TCP_DENIED/407 4072 GET http://ie9cvlist.ie.microsoft.com/IE9CompatViewList.xml - NONE/- text/html 1326878155.705 2 192.168.15.27 TCP_DENIED/407 4317 GET http://ie9cvlist.ie.microsoft.com/IE9CompatViewList.xml - NONE/- text/html 1326878155.709 3 192.168.15.27 TCP_DENIED/403 4026 GET http://ie9cvlist.ie.microsoft.com/IE9CompatViewList.xml kavan NONE/- text/html squid chace 2012/01/18 10:12:49| Creating Swap Directories 2012/01/18 10:12:49| Starting Squid Cache version 3.1.6 for x86_64-pc-linux-gnu... 2012/01/18 10:12:49| Process ID 17236 2012/01/18 10:12:49| With 65535 file descriptors available 2012/01/18 10:12:49| Initializing IP Cache... 2012/01/18 10:12:49| DNS Socket created at [::], FD 7 2012/01/18 10:12:49| DNS Socket created at 0.0.0.0, FD 8 2012/01/18 10:12:49| Adding nameserver 192.168.15.2 from /etc/resolv.conf 2012/01/18 10:12:49| Adding nameserver 192.168.15.19 from /etc/resolv.conf 2012/01/18 10:12:49| Adding nameserver 192.168.15.1 from /etc/resolv.conf 2012/01/18 10:12:49| Adding domain schoenbrunn.local from /etc/resolv.conf 2012/01/18 10:12:49| helperOpenServers: Starting 5/5 'squid_ldap_auth' processes 2012/01/18 10:12:49| helperOpenServers: Starting 10/10 'ntlm_auth' processes 2012/01/18 10:12:49| helperOpenServers: Starting 10/10 'squid_kerb_auth' processes 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| helperOpenServers: Starting 5/5 'squid_ldap_group' processes 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| squid_kerb_auth: INFO: Starting version 1.0.5 2012/01/18 10:12:49| Unlinkd pipe opened on FD 73 2012/01/18 10:12:49| Local cache digest enabled; rebuild/rewrite every 3600/3600 sec 2012/01/18 10:12:49| Store logging disabled 2012/01/18 10:12:49| Swap maxSize 0 + 262144 KB, estimated 20164 objects 2012/01/18 10:12:49| Target number of buckets: 1008 2012/01/18 10:12:49| Using 8192 Store buckets 2012/01/18 10:12:49| Max Mem size: 262144 KB 2012/01/18 10:12:49| Max Swap size: 0 KB 2012/01/18 10:12:49| Using Least Load store dir selection 2012/01/18 10:12:49| Set Current Directory to /var/spool/squid3 2012/01/18 10:12:49| Loaded Icons. 2012/01/18 10:12:49| Accepting HTTP connections at [::]:3128, FD 74. 2012/01/18 10:12:49| HTCP Disabled. 2012/01/18 10:12:49| Squid modules loaded: 0 2012/01/18 10:12:49| Adaptation support is off. 2012/01/18 10:12:49| Ready to serve requests. 2012/01/18 10:12:50| storeLateRelease: released 0 objects smb.conf # Domain Authntication Settings workgroup = <WORKGROUP> security = ads password server = <DOMAINNAME>.LOCAL realm = <DOMAINNAME>.LOCAL ldap ssl = no # logging log level = 5 max log size = 50 # logs split per machine log file = /var/log/samba/%m.log # max 50KB per log file, then rotate ; max log size = 50 # User settings username map = /etc/samba/smbusers idmap uid = 10000-20000000 idmap gid = 10000-20000000 idmap backend = ad ; template primary group = <ad group> template shell = /sbin/nologin # Winbind Settings winbind separator = + winbind enum users = Yes winbind enum groups = Yes winbind netsted groups = Yes winbind nested groups = Yes winbind cache time = 10 winbind use default domain = Yes #Other Globals unix charset = LOCALE server string = <SERVERNAME> load printers = no printing = cups cups options = raw ; printcap name = /etc/printcap #obtain list of printers automatically on SystemV ; printcap name = lpstat ; printing = cups squid.conf auth_param ntlm program /usr/bin/ntlm_auth --require-membership-of=<DOMAINNAME>\\INTERNETZ --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 10 auth_param basic program /usr/lib/squid3/squid_ldap_auth -R -b "dc=<dcname>,dc=local" -D "cn=administrator,cn=Users,dc=<domainname>,dc=local" -w "******" -f sAMAccountName=%s -h 192.168.15.19:3268 auth_param basic realm "Proxy Authentifizierung. Bitte geben Sie Ihren Benutzername und Ihr Passwort ein!" #means insert you PW in an other language - # external_acl_type InetGroup %LOGIN /usr/lib/squid3/squid_ldap_group -R -b "dc=<domainname>,dc=local" -D "cn=administrator,cn=Users,dc=<domainname>,dc=local" -w "******" -f "(&(objectclass=person)(sAMAccountName=%v) (memberof=cn=%a,cn=internetz,dc=<domainname>,dc=local))" -h 192.168.15.19:3268 auth_param negotiate program /usr/lib/squid3/squid_kerb_auth -d auth_param negotiate children 10 auth_param negotiate keep_alive on acl localnet proxy_auth REQUIRED acl InetAccess external InetGroup Internetz http_access allow InetAccess http_access deny all acl auth proxy_auth REQUIRED http_access allow auth and a very suspicious is that by adding the proxy server to the Domain i see 2 new entries in the PC one with the original computer-name leopoldine and one with leopoldine CNF:f8efa4c4-ff0e-4217-939d-f1523b43464d ?!? I tried a lot, really... but i stuck on this problem... i actually i even reinstalled all dependent programs and reconfigured them from default. Group exists and has me in it. Firefox running on the old proxy and i use IE for testing the new one. But i'll get all the time Access-Denited and to be honest i'm quite a beginner, so please don't be to prude. I'll interested in improving, i'll get the information we need to fix this but i started working 2 month ago and got only 1 1/2 year's training and not a single sec. in linux ;)

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• Something very strange with network

  - by Rodnower

  Hello, I have Windows 7 and I have very strange thing with my network. Some time I was connected through wireless router and my IP was 192.168.2.103, router's IP was 192.168.2.1 and some other IP was 192.168.2.100. The last I get from page "active DHCP clients" of web interface of the router and from "wireless clients" I may to see that 192.168.2.100 not (!) belong to my MAC address. Router build by EDimax. So after that I disabled wireless function of the router and restarted it. In this time I had not ping to 192.168.2.1. Also I had not any other connection, not wireless nor cable, but (!) I still had ping to 192.168.2.100 and I not understand what this voodoo is... C:\Users\Andrey>ping 192.168.2.100 Pinging 192.168.2.100 with 32 bytes of data: Reply from 192.168.2.100: bytes=32 time<1ms TTL=128 Reply from 192.168.2.100: bytes=32 time<1ms TTL=128 Reply from 192.168.2.100: bytes=32 time<1ms TTL=128 Reply from 192.168.2.100: bytes=32 time<1ms TTL=128 Ping statistics for 192.168.2.100: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms This is what I had: C:\Users\Andrey>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : Andrey-PC Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Wireless LAN adapter Wireless Network Connection 3: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter #2 Physical Address. . . . . . . . . : 06-1D-7D-40-61-EB DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Wireless LAN adapter Wireless Network Connection: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Gigabyte GN-WS50G (mini) PCI-E WLAN Card Physical Address. . . . . . . . . : 00-1D-7D-40-61-EB DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Ethernet adapter Local Area Connection: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller Physical Address. . . . . . . . . : 00-1B-24-B6-09-91 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes C:\Users\Andrey>arp -a -v Interface: 127.0.0.1 --- 0x1 Internet Address Physical Address Type 224.0.0.22 static 239.255.255.250 static Interface: 0.0.0.0 --- 0xffffffff Internet Address Physical Address Type 192.168.2.1 00-0e-2e-d2-8c-af invalid 192.168.2.255 ff-ff-ff-ff-ff-ff static 224.0.0.22 01-00-5e-00-00-16 static 224.0.0.252 01-00-5e-00-00-fc static 239.255.255.250 01-00-5e-7f-ff-fa static 255.255.255.255 ff-ff-ff-ff-ff-ff static Interface: 0.0.0.0 --- 0xffffffff Internet Address Physical Address Type 192.168.2.1 00-0e-2e-ff-f1-f6 dynamic 192.168.2.101 00-27-19-bc-8b-9c dynamic 192.168.2.102 00-16-e6-6c-ae-d4 dynamic 192.168.2.255 ff-ff-ff-ff-ff-ff static 224.0.0.22 01-00-5e-00-00-16 static 224.0.0.252 01-00-5e-00-00-fc static 239.255.255.250 01-00-5e-7f-ff-fa static 255.255.255.255 ff-ff-ff-ff-ff-ff static Interface: 0.0.0.0 --- 0xffffffff Internet Address Physical Address Type 224.0.0.22 01-00-5e-00-00-16 static 255.255.255.255 ff-ff-ff-ff-ff-ff static C:\Users\Andrey>route print =========================================================================== Interface List 14...06 1d 7d 40 61 eb ......Microsoft Virtual WiFi Miniport Adapter #2 13...00 1d 7d 40 61 eb ......Gigabyte GN-WS50G (mini) PCI-E WLAN Card 11...00 1b 24 b6 09 91 ......Marvell Yukon 88E8055 PCI-E Gigabit Ethernet Controller 1...........................Software Loopback Interface 1 =========================================================================== IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 =========================================================================== Persistent Routes: None IPv6 Route Table =========================================================================== Active Routes: If Metric Network Destination Gateway 1 306 ::1/128 On-link 1 306 ff00::/8 On-link =========================================================================== Persistent Routes: None Only after reboot I lost ping to there: C:\Users\Andrey>ping 192.168.2.100 Pinging 192.168.2.100 with 32 bytes of data: PING: transmit failed. General failure. PING: transmit failed. General failure. PING: transmit failed. General failure. PING: transmit failed. General failure. Ping statistics for 192.168.2.100: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), So what this mysterious cache is? Thank you for ahead.

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• Windows / Apache / PHP CPU at 100% under small load

  - by Bart

  I have a Windows box loaded with Apache 2.2 and PHP 5.2. It runs great if only a few users are on it at a time, but under load testing (50 users for test #1), the CPU climbs up to 100%. Nearly all of this CPU usage comes from httpd.exe. I currently have PHP set up via php5_module, but one of the first things I plan to try next is to use FastCGI instead. Is FastCGI better at handling multiple connections? Any other ideas on what might be causing Apache to run so high?

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• System Variables, Stored Procedures or Functions for Meta Data

  - by BuckWoody

  Whenever you want to know something about SQL Server’s configuration, whether that’s the Instance itself or a database, you have a few options. If you want to know “dynamic” data, such as how much memory or CPU is consumed or what a particular query is doing, you should be using the Dynamic Management Views (DMVs) that you can read about here: http://msdn.microsoft.com/en-us/library/ms188754.aspx  But if you’re looking for how much memory is installed on the server, the version of the Instance, the drive letters of the backups and so on, you have other choices. The first of these are system variables. You access these with a SELECT statement, and they are useful when you need a discrete value for use, say in another query or to put into a table. You can read more about those here: http://msdn.microsoft.com/en-us/library/ms173823.aspx You also have a few stored procedures you can use. These often bring back a lot more data, pre-formatted for the screen. You access these with the EXECUTE syntax. It is a bit more difficult to take the data they return and get a single value or place the results in another table, but it is possible. You can read more about those here: http://msdn.microsoft.com/en-us/library/ms187961.aspx Yet another option is to use a system function, which you access with a SELECT statement, which also brings back a discrete value that you can use in a test or to place in another table. You can read about those here: http://msdn.microsoft.com/en-us/library/ms187812.aspx  By the way, many of these constructs simply query from tables in the master or msdb databases for the Instance or the system tables in a user database. You can get much of the information there as well, and there are even system views in each database to show you the meta-data dealing with structure – more on that here: http://msdn.microsoft.com/en-us/library/ms186778.aspx  Some of these choices are the only way to get at a certain piece of data. But others overlap – you can use one or the other, they both come back with the same data. So, like many Microsoft products, you have multiple ways to do the same thing. And that’s OK – just research what each is used for and how it’s intended to be used, and you’ll be able to select (pun intended) the right choice. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• User Friendly port knocker (port knocking client) for Windows?

  - by Ekevoo

  It seems "It's me" is the most popular port knocking client for windows… Except… it sucks. It works for console-savvy users such as me, but, unsurprisingly, all my users hate console windows. I know better than to force it upon them. I would love to have a nice port knocker for Windows that would be windowed, have launchers, and be easily provisionable (i.e. I tell my user to paste some settings or import some file by double clicking it). To be honest, just not being console-based would be enough.

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• Unit testing ASP.NET Web API controllers that rely on the UrlHelper

  - by cibrax

  UrlHelper is the class you can use in ASP.NET Web API to automatically infer links from the routing table without hardcoding anything. For example, the following code uses the helper to infer the location url for a new resource,public HttpResponseMessage Post(User model) { var response = Request.CreateResponse(HttpStatusCode.Created, user); var link = Url.Link("DefaultApi", new { id = id, controller = "Users" }); response.Headers.Location = new Uri(link); return response; } That code uses a previously defined route “DefaultApi”, which you might configure in the HttpConfiguration object (This is the route generated by default when you create a new Web API project). The problem with UrlHelper is that it requires from some initialization code before you can invoking it from a unit test (for testing the Post method in this example). If you don’t initialize the HttpConfiguration and Request instances associated to the controller from the unit test, it will fail miserably. After digging into the ASP.NET Web API source code a little bit, I could figure out what the requirements for using the UrlHelper are. It relies on the routing table configuration, and a few properties you need to add to the HttpRequestMessage. The following code illustrates what’s needed,var controller = new UserController(); controller.Configuration = new HttpConfiguration(); var route = controller.Configuration.Routes.MapHttpRoute( name: "DefaultApi", routeTemplate: "api/{controller}/{id}", defaults: new { id = RouteParameter.Optional } ); var routeData = new HttpRouteData(route, new HttpRouteValueDictionary { { "id", "1" }, { "controller", "Users" } } ); controller.Request = new HttpRequestMessage(HttpMethod.Post, "http://localhost:9091/"); controller.Request.Properties.Add(HttpPropertyKeys.HttpConfigurationKey, controller.Configuration); controller.Request.Properties.Add(HttpPropertyKeys.HttpRouteDataKey, routeData);  The HttpRouteData instance should be initialized with the route values you will use in the controller method (“id” and “controller” in this example). Once you have correctly setup all those properties, you shouldn’t have any problem to use the UrlHelper. There is no need to mock anything else. Enjoy!!.

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• Does cloud storage replicate the data over many datacenters if so it means i benefit content delive

  - by Berkay

  Let's assume that i want to use cloud storage service from one of the cloud storage provider, i got X gb structured and unstructured data and i will use this data as my contents of my interactive web page. And now i have some doubts about this point.I have many users and they are all visiting my web page from various countries.To be more specific first; does my data stored only of the Cloud Storage data center ? or Does my data replicated over many data centers of my provider? second if so; how can i benefit from content delivery network? (matching and placing users’ content nearest storage data centers)

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• Fast programmatic compare of "timetable" data

  - by Brendan Green

  Consider train timetable data, where each service (or "run") has a data structure as such: public class TimeTable { public int Id {get;set;} public List<Run> Runs {get;set;} } public class Run { public List<Stop> Stops {get;set;} public int RunId {get;set;} } public class Stop { public int StationId {get;set;} public TimeSpan? StopTime {get;set;} public bool IsStop {get;set;} } We have a list of runs that operate against a particular line (the TimeTable class). Further, whilst we have a set collection of stations that are on a line, not all runs stop at all stations (that is, IsStop would be false, and StopTime would be null). Now, imagine that we have received the initial timetable, processed it, and loaded it into the above data structure. Once the initial load is complete, it is persisted into a database - the data structure is used only to load the timetable from its source and to persist it to the database. We are now receiving an updated timetable. The updated timetable may or may not have any changes to it - we don't know and are not told whether any changes are present. What I would like to do is perform a compare for each run in an efficient manner. I don't want to simply replace each run. Instead, I want to have a background task that runs periodically that downloads the updated timetable dataset, and then compares it to the current timetable. If differences are found, some action (not relevant to the question) will take place. I was initially thinking of some sort of checksum process, where I could, for example, load both runs (that is, the one from the new timetable received and the one that has been persisted to the database) into the data structure and then add up all the hour components of the StopTime, and all the minute components of the StopTime and compare the results (i.e. both the sum of Hours and sum of Minutes would be the same, and differences introduced if a stop time is changed, a stop deleted or a new stop added). Would that be a valid way to check for differences, or is there a better way to approach this problem? I can see a problem that, for example, one stop is changed to be 2 minutes earlier, and another changed to be 2 minutes later would have a net zero change. Or am I over thinking this, and would it just be simpler to brute check all stops to ensure that The updated run stops at the same stations; and Each stop is at the same time

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