Troubleshooting is a form of problem solving, often applied to repair failed products or processes.

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1answer
164 views

How do I Interpret a Failed Request Trace?

I have a problem with a web site running IIS 7. The problem are the initial requests to each page: they take far longer than they should. After that first request the page loads fine. I'm sure the ...
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6answers
869 views

Whence for Windows?

I'm trying to determine the location of an executable (java.exe) on Windows. I know it must exist somewhere in the PATH since I can run it, but I don't know the exact directory that it is being run ...
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2answers
1k views

Losing 1/3 of my download speed with my new router, any ideas on how to fix?

This is a cross post from superuser.com since no one over there seems to know anything. I recently replaced a dying D-Link router (DI-524) with a Cisco/Linksys RSV4000. I'm really happy with the ...
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5answers
363 views

Is it realistic to remotely troubleshoot network issues?

I have a small non-profit that I help that has a hub and spoke fiber network on managed Netgear switches. They have both T1 & DSL connectivity, separated by VLAN's with a simple VoIP system ...
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1answer
2k views

High Hardware Interrupt level on Windows Server 2003 (VM)

I have a rather loaded Windows 2003 server. It's mainly loaded with IIS instances (about 6 or 7 w3wp processes) and some sharepoint stuff. The machine was P2V-ed from a real host and now resides on a ...
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3answers
4k views

Exim taking long time to send emails, how to decrease delay in Exim service?

The linux server where exim service is running is under no load. The system is sending email successfully but is taking a long time to send each email. Basically if I telnet to localhost port 25 ...
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5answers
1k views

What is the root cause of a Hard Drive “ticking” sound after 15 min of being on?

In my office there is a laptop dell inspiron 1420 with HD of 100GB of space. The computer is about a year old, and the hard drive has a weird and annoying ticking sound. The ticking sound starts ...
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5answers
543 views

Troubleshooting seemingly random G4 kernel panics and lockups

Recently my 9 year old Apple G4 file server has been randomly crashing. Often it's a kernel panic, but sometimes the system just locks up. It seems almost always to happen when I'm out of my office... ...
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2answers
1k views

How to troubleshoot a hanging process in Windows?

I've been having the same problem with several applications lately -- I start them and they just hang. I don't see anything on the screen, however the application is listed in Task Manager and its CPU ...
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2answers
237 views

What are the most important skill/knowldege sets for a network administrator to have to support VOIP?

As a network administrator (Cisco switches, work with WAN providers, protocol analysis) I have an "area of responsibility" for the customer's VOIP project. The telecom group has primary ...
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1answer
150 views

FTP connection hanging on 200 Welcome to blabla FTP services

I am having problems when connecting to a remote ftp server that is running on UNIX.When I try to coonect it freezes on the welcome screen and it dos=esnt prompt for password and username. Connected ...
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1answer
4k views

clocksource tsc unstable

Ok, now I have real server fault ;) After some time from booting (about one minute) my server hangs. All I can do is hard reset. Then after restart in /var/log/kern.log I can find: Jul 29 22:38:57 ...
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1answer
589 views

linux heartbeat losing packets

I am using linux heartbeat to keep ldirectord running on my webservers. My logs show heartbeat WARN: 1 lost packet(s) every couple of minutes, and I'm having trouble figuring out why. I have tried ...
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1answer
1k views

Postfix Mail Filter Stops Delivering Mail

I have an internet facing postfix mail filter (debian lenny) that sits in front of all our other mailservers on our network, and scans our mail using amavisd-new, clamav, spamassassin, and ...
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2answers
1k views

Supermicro X8DT3-LN4F Troubleshooting

yesterday I built up a new system containing a Supermicro X8DT3-LN4F mainboard and an Intel Core i7-920 CPU with 2x2 GB DDR3 RAM. Each time I power it on, the fans begin to work but I won't get any ...
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2answers
685 views

Why is my system constantly downloading from 255.255.255.255:bootps?

On my workstation I noticed that my network utilization is high and constant even though I don't have any downloads currently going. I fire up iftop and see the following entry at the top: ...
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6answers
387 views

What's in your troubleshooting tool box?

Generally speaking, what's in your truobleshooting toolbox for hardware related problems? Think multimeters, memtest86 and other things, but not wireshark and disassemblers
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5answers
4k views

“Microsoft” has an online tool for troubleshooting Exchange issues - is it nifty?

*please note, I've changed the question in response to the suspicion that this site is dubious. I found this today - https://www.testexchangeconnectivity.com/ Pretty nifty! (or maybe not?) ...
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1answer
179 views

BIND server cannot resolve us3.php.net!

My caching nameserver (BIND 9.3.6-P1) cannot contact 216.194.113.11 or 216.194.113.12 over UDP port 53 for some unknown reason. This prevents anyone at my office from resolving names such as ...
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2answers
3k views

Can't connect to port 80 in Ubuntu Desktop or Server 9.04 in VMWare Workstation 6.52

After a brand-new install of Ubuntu 9.04 Desktop or Server into a VMWare Workstation 6.52 Virtual Machine, I am unable to connect to port 80 on any remote site (google.com, etc). I can ping remote ...
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5answers
3k views

How to translate error number to 'errno' constant?

Suppose I have an application running on a UNIX box that is failing with a system error status of '13'. Now, I can easily look up this value in errno.h, to find out that it is a permission-denied ...
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9answers
2k views

HP Tx1000 laptop : no LCD panel or HDD activity

A HP TX1000 Series laptop PC is unresponsive to the power-on event. What was a previously working machine, the LCD display panel suddenly switched off while the machine was in normal operation. When ...
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6answers
720 views

Debugging Cisco 2621 Routers

I've recently noticed problems with my 2621 router - it becomes unresponsive for about 10 minutes at a time, about 10 times a month. The router sits inbetween the outside world and servers which I ...
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3answers
3k views

How to troubleshoot events in the Windows Event Logs?

How do you troubleshoot events that are not clear when you read them? Is there a website to search for those Event IDs and errors? In the following example event it is clear that the gateway ...
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1answer
1k views

Apache Tomcat Servlet 404 Troubleshooting

I maintain a GWT web application that uses 3 java servlets for file download/upload and data transfer. I had my servlet mapping sin place and have not touched them in months, just a few days ago I ...
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5answers
673 views

Trouble shooting wireless signal performance

I just performed a wireless network scan and my primary wireless route broadcasts a consist 70 DBm signal. I added a range extender that increases or decreases the signal 65 DB (Not sure how the DB m ...
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1answer
600 views

IIS logging troubleshooting

We've got an IIS server that hosts about a dozen small websites. A couple of the websites do not log activity. We've gone into the IIS Admin console and each website is configured to log daily into ...
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4answers
268 views

Software for monitoring network speed and connectivity

I have been experiencing a lot of dropped connections between on all of my devices and it is really frustrasting..... Does anyone recommend free or reasonable price software to monitor signal ...
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1answer
3k views

How to temporarily disable a Cisco IPS module for troubleshooting

I have a Cisco IPS module running in my ASA 5510 firewall. Right now I'm trying to troubleshoot a network/VPN problem that two of my users are having when they VPN into a remote partners site. I ...
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4answers
126 views

Windows Network Connection has filled systray with many icons

I have a user that has a crazy amount of network connections populating his systray and he only has one network card and a wireless card. After a while he can hover over them and they will ...
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12answers
6k views

Citrix degrades with 100% CPU

We have a Citrix PS4.0 farm made up of 2 physical and 2 virtual Citrix servers. Any one of them at some point or another will eventually degrade in performance due to hitting 100% CPU usage. I can ...
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3answers
1k views

Troubleshooting tips for USMT?

We have a large Vista migration underway and are using USMT (User State Migration Tool) to grab profiles in preparation for the push, which has resulted in some problems. The majority of the captures ...
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6answers
3k views

How to troubleshoot a black screen (no video) on boot?

On a related question to this one, now I have a file server whose power supply and fans spin up, but gets no video and no beep codes. I have tried two different video cards in the system, and neither ...
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8answers
8k views

How can I install Windows 7 without burning a DVD or using a USB Drive?

I downloaded the .iso of Windows 7 and would now like to install it as my main OS. However I can't because I don't have a DVD Burner, a 2+ GB USB Drive, or a external HDD (or extra HDD). So how can I ...
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5answers
2k views

How can I troubleshoot a broken on/off switch?

I have a file server that was recently relocated in a transoceanic move. It isn't under warranty, as it was a custom-built in-house tower. When I hooked everything up and tried to boot it, the system ...
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7answers
516 views

General tips for interpreting error logs

Reading log files can be pretty frustrating as, by nature, their content says as much about the developer who penned them as the problem itself. Do you have any general purpose tips for interpreting ...
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2answers
412 views

Troubleshooting apache redirects in production

How do you troubleshoot Apache redirects in production? I know there's a logging feature somewhere that lets you log all the redirects that happen...
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3answers
1k views

Email delivery is slow between us and counterparty. What can I do to determine root cause?

Emails between us and a specific counterparty are delayed. To give you some idea, we send 10 messages and over 40% arrive with a 20 (or greater) minute delay. We even had two messages arrive in 50 ...
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7answers
2k views

how do you troubleshoot network performance of a web application

This is a pretty naive question, I guess. I frequently need to figure out what if the problem with a web app or is it simply a networking issue - lost packets or a slow connection in any point ...
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2answers
209 views

Troubleshooting Group Policies?

we built a plain Windows 2008 Server park a few months back, and set up a few Group Policies. Most of them seem to work fine, but once in a while I have the feeling that one or more have not been ...
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2answers
3k views

Webdav troubleshooting on Mac OS X

Are there any tools/instructions/pointers about how to troubleshoot webdav problems on Mac OS X? Any secret mount options, undocumented webdav module logging, anything? What I usually do is to ...
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12answers
553 views

What's the first thing you check when an untouched unix server starts going berserk?

So you have this neatly setup unix server and it's super fast and works swell and everything is great for months, and suddenly all kinds of weird errors start showing up for a variety of different ...
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9answers
24k views

Can ping machine by IP but not by name [closed]

On my home network, connected by means of a LinkSYS WCG200 Wireless-G Cable Gateway and a Unicom switch I have several computers. One of these is an XP Home machine that I can ping by IP but not by ...
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9answers
5k views

Your troubleshooting rules, approach to troubleshooting?

Do you have any general rules that you fall back on when you troubleshoot a difficult network/hardware/software problem? Eg: "I isolate the source of the problem by testing a peripheral with a second ...
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5answers
135 views

Is there any way to tell what is causing an application to lock up?

This happens on a number of PCs (WinXP SP3), where an application will simply lock up. It may be the browser (usually Firefox in our case) or it may be Visual Studio, or something else, but every ...
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6answers
828 views

How to do periodic Sql Server performance monitoring and troubleshooting?

What are the best tools and processes for periodically monitoring and troubleshooting sql server performance issues?
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3answers
1k views

Troubleshooting (or tracing) Windows network logon problems

I've got a situation where a client computer (Windows Vista) doesn't seem to be sending the right password to a server (Windows Server 2003). The event log records the logon failure, but as far as I ...
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5answers
2k views

How can I troubleshoot an immediate computer shutdown?

I've had my desktop for ~4 years now, and recently it started behaving really badly: Whenever I run a Flash webgame or anything that takes up a great deal of memory - like a game, for example - ...
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5answers
1k views

How to troubleshoot hanging linux server

I have several Ubuntu Server 8.04 machines at a remote location. Every couple of months or so, one of them would stop responding and need to be power cycled. From looking at my log files it seems that ...
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4answers
311 views

How do you troubleshoot wireless woes?

Sometimes I have to troubleshoot machines on my LAN which have flaky wireless connections without any seemingly logical reason. Contrary to "normal" network connections in most cases I don't know ...