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Questions tagged [troubleshooting]

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

It is a logical, systematic search for the source of a problem so that it can be solved, and so the product or process can be made operational again. Troubleshooting is needed to develop and maintain complex systems where the symptoms of a problem can have many possible causes.

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Windows Server 2008 R2: Weekly network failure

Thought I would throw the question on here, as I'm not a seasoned sysadmin... Every Thursday (or there about) at no particular time, the server becomes unresponsive to its usual network operations (i.e. AV updating, not allowing RDP connections,…
MHibbin
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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 policy-weightd. This server was set up and configured using…
Brent
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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 video on the onboard VGA output (enabled by jumper…
Delinquent
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unexpected server power off

Once or twice per day I find a server I have powered off with no apparent reason. Info and what I've done until now: Nothing is being reported under /var/log/. Just normal server activity and then the startup logs when I manually power on the…
cherouvim
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Troubleshoot IIS 6 and Intermittent SQL Server Connectivity Loss

I am not a System Administrator, but I am temporarily trying to fill that role. I have 2 Windows 2003 Servers. 1 server has my Microsoft SQL Database (SQL Server 2005) and the other is the web server with IIS6. Intermittently (once every month…
jpsnow72
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Server unresponsive, messages shown on console but not in log files

I'm using Ubuntu Server 10.04.4, and once in a while the server hangs (once a month) and is totally unresponsive. The tty is flooded with messages like these. The problem is that these messages are not in my log files after reboot. How to log these…
raistlin majere
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How to troubleshoot banned connections on OS X / Ubuntu

I have an ubuntu 11.10 VM running on an OSX machine. Every once in a while some services become inaccessible from specific IPs (e.g. sometimes just ssh is blocked, and sometimes both ssh and https.) The blocking of e.g. the ssh isn't per user, since…
GJ.
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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 sites, but anything over port 80 will not…
Ian
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How to verify DNS change is active

I have DNS service from a third party, which provides an webapp for changing the DNS. I changed the DNS settings to point one of the domains I control to our new IP, but it's been hours and there was no change to the status. Not being very familiar…
Ilari Kajaste
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Cisco 878 Router Physical Layer troubleshooting

My problem: Upon connecting the FastEthernet0 with a straight-through cable to a Catalyst switch, the line protocol comes up briefly and then goes down. Interface goes down too, I now have this on my show ip int brief: Interface …
glenn
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What factors can disrupt a VSAT connection?

In some locations, the only option for an internet connection is to use some form of Satellite dish. Like any wireless medium these can be quite tricky to troubleshoot. What factors have you observed which have caused problems with a VSAT…
dunxd
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What sort of network problems can a single NIC host cause?

A remote office has a Cisco ASA 5505 connecting the LAN to our HQ LAN via VPN. When a particular Windows XP PC is connected to the ASA via a switch, the VPN tunnel drops, and after a short while, all connections through the ASA stop working. …
dunxd
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Can't update SQL Server 2008 to SP3, it only offers the option to create a new instance

A colleague is attempting to update our server's SQL Server 2008 version 10.0.1600.22 (not R2) install up to SP3. Unfortunately, we can't work out where the "Update" button is; the installer seems to be set on creating a new instance, which isn't…
Margaret
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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 the machine is switched on now, the machine…
NinethSense
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How to check http errors with Windows 2008 Server?

This is the best I can describe my problem... I am running a search engine scraper essentially on Windows 2008 Server. Constantly accessing millions of random domain names and following their links basically. After a few hours of serious scraping...…
darkAsPitch
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