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• diagnostic multicast issue using wireshark

  - by Abruzzo Forte e Gentile

  I have a network that is setup for multicast traffic. My setup is the following -Machine A : a server generates multicast traffic. -Machine A : few clients subscribing to that multicast traffic -Machine B : few clients subscribing to that multicast traffic # Address I am using IP : 239.193.0.21 PORT: 20401 The clients in machine A , even if they join the group (I can see IGMP messages through wireshark), don't receive any data while (and this is the funny part) machine B,C and D receive everything. I sorted that issue by completely disabling Linux firewall. Before doing that, I enabled the multicast on the firwall ('reject all'). iptables -A INPUT -m addrtype --src-type MULTICAST -j ACCEPT My question is the following: what I can check in wireshark that can help me in spot such firewall issues in the futures? For TCP/IP I realize by using ping and looking at ICMP packets rejected. What I can check/monitor for multicast? I am using LInux/Red-Hat Enterprise 6.2

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• Remote Desktop closes with Fatal Error (Error Code: 5)

  - by Swinders

  We have one PC (Windows XP SP3) that we can not log onto using a Remote Desktop session. Logging on to the PC directly (sitting in front of it using the connected keyboard and monitor) work fine. From a second PC (tried a number of different ones but all Windows XP SP3) I run 'mstsc' and type in PC name to connect to. This shows the login box which we can enter the correct login details and click OK. Within a few second we get an error: Title: Fatal Error (Error Code:5) Error: Your Remote Desktop session is about to end. This computer might be low on virtual memory. Close your other programs, and then try connecting to the remote computer again. If the problem continues, contact your network administrator or technical support. None of the computers we are using are low on memory (2Gb+) and we let windows manage the virtual memory side of things. We do not see this with any other PC and do use Remote Desktop in meeting rooms to connect to user PCs with no problems.

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• Command line DVD to ISO ripper

  - by RandomInsano

  I have an old XBOX with XBMC installed and I want to rip my dvd collection to my home server as ISO files so that I can watch them over the network. My server is headless (no monitor), so I need the software to run on Solaris, Linux or OpenBSD without X11 running. Does such a magical tool exist? I've seen vobcopy, but does that only work on VOBs? Since XBMC supports DVD menus and everything as though it was a straight disc, I'd rather have my backup work exactly as it does without needing my DVD.

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• Icinga error "Icinga Startup Delay does not exist" although it does

  - by aaron

  I just installed icinga to monitor my server following this guide: http://docs.icinga.org/0.8.1/en/wb_quickstart-idoutils.html Everything built and installed correctly, but icinga is reporting a critical error with the reason: "The command defined for service Icinga Startup Delay does not exist" However, I can see that ${ICINGA_BASE}/etc/objects/localhost.cfg contains: define service{ use local-service ; Name of service template to use host_name localhost service_description Icinga Startup Delay check_command check_icinga_startup_delay notifications_enabled 0 } and ${ICINGA_BASE}/etc/objects/commands.cfg contains: define command { command_name check_icinga_startup_delay command_line $USER1$/check_dummy 0 "Icinga started with $$(($EVENTSTARTTIME$-$PROCESSSTARTTIME$)) seconds delay | delay=$$(($EVENTSTARTTIME$-$PROCESSSTARTTIME$))" } both of these files had not been modified since the whole make/install process. I am running on Ubuntu 10.04, most recent build of icinga-core, and apache2 2.2.14 What must I do to tell Icinga that the command exists? Or is the problem that check_dummy does not exist? Where or how would I define that?

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• Are Mac Minis suitable for a proper desktop computer?

  - by alex

  I've read about a lot of people using their Mac Minis as a file server, or media centre or something similar. Does the mini function alright as a standard desktop PC? The Mac will be used primarily for web development, that is, it will need to run Coda, Photoshop, possible Firefox and Safari at the same time. So it will need suitable performance. Or am I better off getting an iMac? I though the mini looked like a good option because: cheaper I already have a keyboard, mouse and 24" monitor I could use a KVM between the mini and PC Also, does the mini support multiple monitors? Thanks

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• API Management Solutions

  - by Mike

  I'm currently building an API and am looking for a tool to allow me to monitor (in a GUI) and rate limit usage. I've come across a few enterprise solutions including: http://apigee.com/ http://mashery.com/ http://www.layer7tech.com/ http://www.3scale.net/ The Apigee enterprise plan is exactly what I'm looking for but plans start at $3000 / month which is out of my price range. The other solutions are all either to expense or do not provide the solution I'm looking for. This led me to look at some open source options including: http://apiaxle.com/ https://code.google.com/p/varnish-apikey/wiki/UsageManual Varnish seems like a fairly complete solution, however I would need to build a GUI to visualise the data. My final option would to build a solution from scratch using EventMachine and ruby. Any advice?

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• Apache error_log repeated attempts to access forum.php

  - by bMon

  About every two seconds I am getting: [Sat Feb 19 19:00:01 2011] [error] [client 69.239.204.217] script '/var/www /html/forum.php' not found or unable to stat [Sat Feb 19 19:00:04 2011] [error] [client 69.239.204.217] File does not exist: /var/www/html/404.shtml ..in my /var/log/httpd/error_log file. Sometimes the request will be for forum_asp.php. I'm assuming its a bot trying to access insecure forum files, but I'm not so sure since it appears each is a unique IP and not just a few rouge IPs hitting it consecutively. And whois results of the ip's aren't all the classic ISP in Russia or China, they are more end user address (comcast, etc). Any insight into whats going on here would be appreciated. Also, any techniques people use to do a "live monitor" of web traffic would be appreciated. Right now I'm doing a: tail -f error_log Thanks.

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• Forcing DFS replication on Windows 2003 Web Edition SP2

  - by Greg B

  I have a pair of web servers running Windows Server 2003 Web Edition SP2 (build 3790). There servers are a on a Gigabit LAN and are on the same subnet. I created a new link on the 1st server and added the second box as a target to the link. I configured replication as ring. The 2nd server gets some of the files on the scheduled replication but this varies wildly which makes me think it's not running fully. The folder on server 1 is 1.3GB. Is there some way I can force repication (from a console?) and monitor the progress and see if/when/why it fails.

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• What are good values for PSU voltages?

  - by earlz

  Hello, I have an odd computer I'm trying to fix that will crash only during the setup of an OS(crashes on every OS I've tried so far) It's not overheating and it is stripped down as much as possible and I've tried multiple harddrives, and memtest86+ can run on it for 3 hours without a crash or fail. So, I was a bit stumped and was looking in the BIOS for possible causes and found a hardware monitor that shows PSU voltages. They are: VCORE: 1.432V 3.3V: 3.136V 5V: 5.273 12V: 12.144V I thought the 3.3V looked a little low, but I'm not really sure on how "bad" that is. So, what are the good ranges for the voltages on each CPU rail?

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• Windows 7 Can't Get Past Format

  - by Soren

  Just assembled a new machine: MSI 880GM-E41 motherboard 500GB Samsung hard drive AMD Athlon II X4 640 processor 4GB RAM Windows 7 64 Bit LITE-ON Black 4X Blu-ray reader I boot up, start the install. When it gets to the screen to select what partition, the motherboard loses power. It doesnt make sense, I can leave it in the bios settings for a very long time and it doesnt lose power. When it does lose power, the monitor shuts down and the mouse loses power, but the power light stays on. I cannot tell if it is a harware or software problem.

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• Windows XP: Nvidia GeForce 6100 Brightness

  - by ExProG

  Hello, I have an Nvidia GeForce 6100 and using XP. I also have a SmartBoard. my brightness settings are completely changed and are not good. I tried changing the settings at the Nvidia GeForce 6100 nForce 430 color correction settings. I cannot get any ideal, it's just way to bright, what do i have to do? I already tried my monitor brightness settings and the smartboard brightness settings. it does not matter. I think there are problems with the pixels. How can i fix this? Is there something wrong with my video card?

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• SQL Server replication - Log Reader Agent Read Latency Issue, Please help

  - by envykok

  Hi all, I am facing one transactional replication delay issue on log reader agent. The log reader output is : ********* STATISTICS SINCE AGENT STARTED ************** 02-28-2011 20:12:08 Execution time (ms): 304141 Work time (ms): 304016 Distribute Repl Cmds Time(ms): 303764 Fetch time(ms): 300813 Repldone time(ms): 1826 Write time(ms): 5319 Num Trans: 15500 Num Trans/Sec: 50.984159 Num Cmds: 191639 Num Cmds/Sec: 630.358271 It seems Log Reader Reader-Thread Latency, and I also run 'sp_replcounters' and see more than 20,000 sec replication latency and keep on increasing. I used SQL profiler to monitor sp_replcmds and found sp_replcmds execution time was 11 sec to 15 sec Is it there any way to optimize to make Log Reader read faster from transaction log??? Other information: SQL Server 2008 (SP2) Standard 64 bit

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• Easy Server Monitoring/Logging point in time solution?

  - by Andre Jay Marcelo-Tanner

  I managed my company's servers and I need to know if load spiked at 3am on the web or mysql server, what processes were active in apache or what queries were going on in mysql at that point in time and maybe any other information that will help me. I know all of that is in log files all over and its literally a PITA to look it all up and correlate data. isnt there 1 solution thats been invented. i know we have pingdom to monitor uptime and responsiveness. like if it has taken 30 seconds to load a page or an error was given by apache or php or mysql to the browser, i want to know that and what mysql processes were running at the time, the apache full status and maybe top output also. stuff like that also would be looking for a SAAS like cloudkick, something i dont have to spend an entire month of work hours setting up when we can pay for something cheaper.

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• Are there any tools for monitoring individual Apache virtual hosts in real-time?

  - by Dave Forgac

  I'm looking for a way to monitor and record Apache traffic, separated by virtual host. I am currently using Munin to capture this and other data for the entire server however I can't seem to find a way to do this by vhost. This link describes using a module called mod_watch which is apparently no longer in development: http://www.freshnet.org/wordpress/2007/03/08/monitoring-apaches-virtualhost-with-munin/ The file that is listed as being compatible with Apache 2.x is reported to have problems with missing vhosts an reporting data correctly. Does anyone know of a reliable way to determine real-time traffic per vhost? If I can find this it should be easy enough to write a new Munin plugin. Edit: What I'd really like to see is something similar to the Apache server-status scoreboard page with the number of connections / requests separated by virtual host. This would give me the ability to check which vhost may be experiencing a spike in traffic in real time and would also provide the data needed for a Munin module (or some alternative performance monitoring / analysis system.)

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• Software for failover across multiple external hosts

  - by Lin

  I have multiple webservers with the same content, hosted across different providers. However, I can't seem to find a nice, simple failover solution. Load-balancing software (Pound, HAProxy, etc.) are unnecessary, and I need the flexibility to manage over 100+ domains, so the paid DNS failover solutions I've found are too expensive. So far the simplest solution I've thought of is just to set a very low TTL (30min - 1hr) in each zone entry on my nameservers (running BIND). Then, continuously monitor each server, and temporarily remove failed servers from zone entries. But this seems like something that should be currently available. I only have root access to different VPSes running CentOS. Any suggestions? Thanks!

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• Beep code for Dell Poweredge T105

  - by Thomas

  I can't start my Poweredge T-105 just after two years. It does not display any on monitor but blue lights on 3 & 4 of system case. And it repeatedly beeps. At first, it beeps 1-3-3 and then repeats 1-1-3-4. As far as I can search on the net, Dell's beep code is 3 digit. So do I have to consider the beep code for my error is 1-3-3? Unfortunately, my warranty expired last year so any hint will be appreciated.

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• Wireshark can see outside of the virtual machine?

  - by OSX Jedi

  I'm running Windows in a VM inside of OSX. If I start Wireshark inside Windows, then a message from OSX pops up saying that Wireshark is trying to monitor all network traffic. If I accept, then Wireshark starts showing all sorts of network activity. This can't be from Windows, because I don't have anything in there doing anything, but I am running things which are communicating through the internet in OSX. Is Wireshark able to see the network activity from OSX? How can it do this if it's inside a virtual machine?

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• Configuring and managing Windows web server

  - by Mike C.

  Hello, I run a few websites and I was thinking of paying for a dedicated Windows web server from GoDaddy instead of paying for each site's hosting individually. I know enough about IIS to configure the Host Header and stuff like that, but I'm a little fuzzy about the email portion of the hosting. I have a few questions: Do I need to install an SMTP server on the web server to allow for emails to be sent/received to a website email address? Or is there another approach that I'm unaware of? Are there tools that monitor the amount of bandwidth used by the server? GoDaddy charges for bandwidth and I want to make sure I don't go over. Am I opening a can of worms that I don't really want to open by going the dedicated server route? Things like server updates, security, etc? Thanks!

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• "Breadcrumbs" for series of hostnames?

  - by Hamy

  Does anyone know of a shell that would show a series of breadcrumbs as I navigate into/out of various servers, like this: Home > Build Machine > Vagrant > Docker-base Hopefully it could auto-detect logging in and out of various boxes and display the hostnames. Perhaps with a simple "no circular links", one could just try and monitor the hostname, but I don't know if there is a shell that can easily act as a 'parent' to the other shells on these various systems so that it can query hostname and/or other item. Any thoughts?

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• No sound (USB speakers) in Ubuntu 9.04 Jaunty Jackalope

  - by Mike

  I just installed Ubuntu 9.04 and have been unable to get sound functioning. I have a set of USB speakers (not USB powered with a stereo plug... they are totally USB). I've tried plugging them directly into the tower as well as into the USB port on my Dell 2405FPW monitor. Both USB ports are functioning correctly (I tested by sticking a flash drive in there - they both read it), and the speakers are functioning correctly in Windows. If it's relevant, I have an SB Audigy 2 sound card that came with the computer, but is not being used. Any ideas? Thanks! EDIT: These are the speakers - Logitech S-150 USB Speakers

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• Virtual memory on Linux doesn't add up?

  - by Brendan Long

  I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So I switch over to the Resources tab, and it says I'm using 462 MB of memory and not touching swap. I'm confused. What does the virtual memory amount mean then if the programs aren't actually using it. I was thinking maybe memory they've requested but aren't using, but how would the OS know that? I can't think of any "I might need this much memory in the future" function..

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• CPU's on Hyper-V host system is just idling, even though VM's are at full throttle

  - by Bjørn

  Hello, I have a server that is running Windows 2008 64 bit Hyper-V, with 8 gigs of RAM and Intel Xeon X3440 @ 2.53 Ghz, which gives me 8 logical cores in the performance monitor on the host system. I have set up three Virtual Machines, all running Windows 2008 32 bit. Build server, running Team City Staging server SQL Server, running SQL Server 2005 These three machines are running very sluggishly, they are at 100% cpu even though the host system is barely using any cpu at all, typically below 10% total. Could anyone please give some tips as to the best setup for CPU allocating? Should I have set each server to have two cores, or should I increase this number above the total number of cores on the host? What is a good number to set on the Virtual Machine Reserve and Virtual Machine Limit? Is 8 gigs of physical RAM insufficient for 3 VM's? Thanks for reading. :)

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• Autoscale Rackspace Cloud, Scalr or DIY?

  - by Andre Jay Marcelo-Tanner

  I'm looking into creating a setup on Rackspace Cloud that will allow me to autoscale my webservers (no db) on demand. Preferably using something like response time. I've read into configuration tools like Puppet/Chef, but I'm thinking I can just launch from prepared server images that are ready to go. Is there any tool out there already that can monitor my existing node response times and then launch or scale up new ones based upon certain variables like average X load over Y time? I see there are commercial offerings like Scalr, Rightscale, but how would I do this myself?

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• When using Bundler and Rails 2.3.5 I get uninitialized constant SubdomainFu when migrating

  - by user347480

  Hi I'm using bundler with rails 2.3.5 and I'm trying to make sure everything is working correctly but when I do a "rake db:migrate --trace" I get this ** Invoke db:migrate (first_time) ** Invoke environment (first_time) ** Execute environment rake aborted! uninitialized constant SubdomainFu /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:inload_missing_constant' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in const_missing' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:inconst_missing' /Users/node/Projects/Race-RX/config/initializers/subdomain_config.rb:1 /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:in load_without_new_constant_marking' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:inload' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:in new_constants_in' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:145:inload' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:622:in load_application_initializers' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:621:ineach' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:621:in load_application_initializers' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:176:inprocess' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:in send' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/initializer.rb:113:inrun' /Users/node/Projects/Race-RX/config/environment.rb:9 /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in gem_original_require' /opt/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:inrequire' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in require' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:521:innew_constants_in' /opt/local/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:156:in require' /opt/local/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/tasks/misc.rake:4 /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:incall' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in execute' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:ineach' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in execute' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:ininvoke_with_call_chain' /opt/local/lib/ruby/1.8/monitor.rb:242:in synchronize' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:ininvoke_with_call_chain' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in invoke_prerequisites' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:ineach' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in invoke_prerequisites' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:ininvoke_with_call_chain' /opt/local/lib/ruby/1.8/monitor.rb:242:in synchronize' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:ininvoke_with_call_chain' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in invoke' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:ininvoke_task' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:ineach' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in top_level' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:inrun' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in standard_exception_handling' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:inrun' /opt/local/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 /opt/local/bin/rake:19:in load' /opt/local/bin/rake:19 I don't know what could be causing this. I did however but my require "rubygems" require "bundler" Bundler.setup in my enviroment.rb file but that doesn't see to be the problem.

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• Continuing permissions issues - ASP.net, IIS 7, Server 2008 - 0x80070005 (http 500.19) error

  - by Re-Pieper

  I created an ASP.net MVC developed web application and I am trying to set up IIS. The Error: Http error 500.19, error code 0x80070005, Cannot read configuration file due to insufficient permissions, config file: C:\inetpub\wwwroot\BudgetManagerMain\BudgetManager\web.config If I set the AppPool to use 'administrator' i have no problems and can access the site just fine. If i set to NETWORK SERVICE (or anything else including self-created admin or non-admin user accounts), i get the above error. Things I have tried: identity for Application pool named 'test' is 'NetworkService' Set full access privs for wwwroot and all children files/folders verified effective permissions and NETWORK SERVICE has full access. Authentication on my site is set for anonymous and running under Application Pool Identity I do not have any physical path credentials set on the website confirmed website is set to run under the application pool named 'test' using Process Monitor, here is a summary of what i found on the ACCESS DENIED event EVENT TAB: Class: File System Operation: CreateFile Result: Access Denied Path: ..\web.config Desired Access: Generic Read Disposition: Open Options: Sybnchronous IO Non-Alert, Non-Directory file Attributes: N ShareMode: Read AllocaitonSize: n/a PROCESS TAB ...lots of stuff that seems irrelevant User: NT AUTHORITY\NETWORK SERVICE

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