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

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815 views

Juniper ssg 5 web UI not working

I am facing issue with my Juniper SSG 5. I tried to configure & enable web filtering in my office following various ways to do it on the web. Even with various permutations it is still not ...
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3answers
3k views

Troubleshooting linux server reboots?

I have a Linux server I've just set up, debian squeeze, 2.6.32-5-amd64, and over the past week it's rebooted three times, twice in one day. There was no power outage that I am aware of (and it's ...
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2answers
234 views

my ssh sessions are randomly killed on Debian

I have a Debian 6.0.1 vanilla install, and I use PUTTY to ssh into it. I will usually have 3 or 4 PUTTY login shells running at the same time. What I'll find is that if I leave my computer for a ...
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1answer
506 views

High ping everywhere except one PC

I have a network with a really high ping (usually more than 500ms) except for one laptop. And in that laptop the ping is usually 5ms. I've tried: - using same model laptop - compare lan driver ...
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1answer
46 views

Troubleshoot DBMail in SQL Server 2005

On a SQL Server 2005 machine, I have DBMail setup and correctly configured. I am able to use "Notify Operator" and EXEC msdb.dbo.sp_send_dbmail to queue emails. But the problem is the queued mails ...
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2answers
107 views

troubleshooting a printer problem

I have a large Kyocera Printer/Scanner/Copier machine in a office with three PCs (all plugged into a lan via router. The three PCs all have individual printers (inkJets) hooked directly via printer ...
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0answers
3k views

ADFS 2.0 Errors Event ID 184 & 364

I have ADFS servers set up and each component such as in URN, relay, claims etc. in place, but am getting this error massage "There was a problem accessing the site. Try to browse to the site ...
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1answer
622 views

Maximum amount of memory per session with IIS/.NET

I'm troubleshooting some memory issues we're running into with a heavily used ASP.NET site hosted on IIS6. Intermittently we have to manually recycle our application pool (process) to resolve issues ...
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2answers
2k views

Cannot mount /dev/sdc1 on Debian 5.0, special device /dev/sdc1 doesn't exist

I'm trying to fix an odd problem I'm having that I've never seen or heard of before. I have a disk, /dev/sdc and I'm trying to mount it, but cannot. sudo mount /dev/sdc1 /mnt mount: you must ...
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1answer
582 views

Port forwarding not working, tcpdump shows “reset connection”

I have an home web server that I use to serve a few pages for personal purposes. The server runs Ubuntu and is behind an ADSL connection, and it's working nicely. Recently I subscribed to a Hiperlan ...
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1answer
475 views

How can you identify why a Windows service (TeamCity build agent) is hanging when running a command?

I've got a problem with a Windows service I just simply can't get to the bottom of. What I'm trying to do is execute the HP WebInspect 9.0 application from a TeamCity build agent which runs as a ...
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1answer
235 views

mac OS X version 10.6.5 network connection troubleshooting/solution?

Im connected to a small office network where where everything works fine. however once in a while or on a random occasion usually after the computer has been left on or on sleep all night there are ...
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1answer
216 views

DHeapmon not reporting expected number of total desktops in IIS6

Hope someone can help me make sense of this. I'm trying to debug some COM+ errors we see in our production environment and a few of them report that the desktop heap is exhausted, so I installed ...
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1answer
88 views

DNS oddities with different nameservers

My ISP's DNS servers are sometimes sketchy, so I use 4.2.2.1 and 8.8.8.8 respectively. The Layer 3 DNS server and Google's DNS server. Sometimes there will be a long delay in resolving, and if I ...
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1answer
545 views

COM+/Desktop Heap errors in IIS affecting sites at random?

We have a Win2K3 server that is hosting 30+ sites. Each site is configured to have its own unique application pool -- so that we can manually recycle specific sites if needed and not kill sessions ...
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1answer
339 views

How do I troubleshoot network connectivity problems in windows?

I'd really like to understand how to debug my network connectivity issues, but everything I find on the internet is either for basic users on "How to add a wireless network" or it's people talking ...
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1answer
3k views

What causes the issue (possibly packet loss) in this scenario

I'm trying to diagnose a network related problem - please understand these points before suggesting an answer (apologies if more information is required, I will add anything people ask). We have a ...
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1answer
543 views

Random Ubuntu server network disconnects

After installing Ubuntu Server 10.04.1 on a new x86_64 kvm instance (Debian 6.0 hosted) I'm getting -apparently- ramdon disconnects from the server. Read from remote host myserver: Connection ...
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5answers
2k views

Open ports broken from internal network [duplicate]

Quick summary: Forwarded port works from the outside world, but from the internal network using the external IP the connection is refused. This is a simplified situation to make the explanation ...
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3answers
18k views

page allocation failure - am I running out of memory?

Lately I've noticing entries like this one in the kern.log of one of my servers: Feb 16 00:24:05 aramis kernel: swapper: page allocation failure. order:0, mode:0x20 This is what I'd like to know: ...
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2answers
1k views

Troubleshooting PXE Boot in CentOS

I am working on troubleshooting a PXE server that we have setup for use. It is based upon Cent OS 5.5. We installed the following components on top of a relatively vanilla install of Cent OS: ...
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3answers
86 views

Resources on Java for Sys Admins? [closed]

I've been fortunate enough to make it four years as an SA without having to administer systems making use of Java. My luck has run up and I am starting a new job and they make extensive use of Java. ...
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1answer
531 views

How to analyze which virtual host account is most greedy?

Hi there and sorry if this is too noobish. I've tried to find the answer myself as I usually do but I failed. What is the best practice when I need to analyze which virtual hosts are consuming the ...
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3answers
6k views

Fixing BIND9 rndc error “connection to remote host closed”

I just made some changes to a DNS zone in Webmin and clicked the "Apply Changes" button. I received the error message: rndc: connection to remote host closed This may indicate that the remote ...
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4answers
135 views

Troubleshooting Guides for End-Users

I am an IT Administrator. I would like to create and distribute simple troubleshooting guides for my end-users. Does anyone know if these can be purchased anywhere? Has anyone tried a similar project ...
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1answer
377 views

VMware server 2.0 SYN/ACK repeating issues

VMWare Server 2.0.0 Build 122956 I am having some issues with connecting into a guest VM (Ubuntu linux 4.4.3-4 lucid) running under VMware 2.0 on a windows server host. All connections to and from ...
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2answers
625 views

Need help trying to diagnose Symmetrix SAN performance issues

I am helping to benchmark hardware for a new SQL Server instance, and the volume presented to the OS for the data files is carved from a set of spindles on a Symmetrix SAN. The server has yet to have ...
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6answers
870 views

My Ubuntu 10.04 server kills all WAN bandwidth when it's attached to my LAN. Where do you begin troubleshooting?

First I should say that my Linux knowledge is minimal; just enough to set up some servers (Apache, Tomcat, Couch, etc). I built a MiniITX server to host some simple sites, act as an SSH tunnel while ...
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1answer
574 views

Troubleshooting why my SSH sessions hang for a couple of seconds

I'm logged in to my development box via SSH (using PuTTY on my laptop) and periodically, the session would just hang for a couple of seconds then becomes responsive again. I have not been able to ...
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2answers
1k views

What steps should I take to determine the root cause of linux server failure?

I am sorry if this question has been addressed before, I am assuming it has, but after a half hour of searching I couldn't find anything. Anyway, to the question: I am a windows guy and a ...
2
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1answer
217 views

VPN troubleshooting

I have a user that is having trouble VPN to the office. What are you top troubleshooting things to try to find out where the problem is. The error the user is getting is Error 806 - a connection ...
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1answer
190 views

Apache Permission issue

How do I resolve an issue of permissions in apache. The initial task that I am trying to get working is to upload a mura plugin the the temp directory of ColdFusion9. However, I have since discovered ...
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1answer
305 views

blat.exe getting deleted from my servers

we're using blat.exe as part of many of our setups on Windows Server 2003 SP2 without any problem to send mails via command line. It's simply great. Now, some software we are using provides blat.exe ...
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1answer
4k views

RSA Authentication Manager - Unable to resolve principal by login ID and/or alias

I'm attempting to setup a RSA authentication manager with a Microsoft Active Directory as the identity source. When I try to login from the Windows login client the login attempt failed and I recieve ...
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2answers
2k views

How can I diagnose an Ubuntu system freeze after reboot

One of our servers froze yesterday, apparently refusing to serve any HTTP requests. The tech guy on site could not connect remotely to the machine, so he rebooted the (virtual) machine from the VMware ...
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1answer
263 views

Unexplained Opsview configuration error

Somehow I've broken by Opsview configuration, and it gives me a completely unhelpful error: critical 2010-10-12 12:09:57 Cannot reload:. It looks like there should be more info, but there's not. I ...
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1answer
425 views

Troubleshooting Windows XP “RestrictRun” policies

I'm at a site where user accounts are limited to running only certain programs (according to file name), through the Windows XP RestrictRun policy mechanism. I realize this is largely useless as a ...
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1answer
294 views

Track email sent to a specific address in Exchange 07

I have SBS 08 with Exchange 07. Domain users have several email addresses pointing to their mail box. For example John Smith: jsmith@..., john.smith@..., smith.john@... I want to track emails sent to ...
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2answers
1k views

Why does samba server fail to start with PANIC error?

I'm seeing an error when trying to start smbd: # smbd -i smbd version 3.2.5 started. Copyright Andrew Tridgell and the Samba Team 1992-2008 ...
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1answer
68 views

IT counterpart to medicine's ICD-10/DSM-IV for diagnosing problems?

I've often thought about why there aren't any diagnostics manual on a very broad level, a counterpart to the medical DSM-IV/ICD-10 manuals. From a troubleshooting perspective, the work of an ...
0
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1answer
155 views

centos server - basic troubleshooting steps

I have a VPS server running CentOS - it's been great for about a year but has just got a little flaky, going down every couple of days and requiring a reboot. I was hoping you could offer me any ...
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1answer
35 views

Failure to install ServletExec 4.2

We are attempting to install ServletExec and get this puzzling error during the installation: we can install to XPSP2 with out getting the error. we get the error when attempting to install on ...
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2answers
1k views

Postfix not actually sending e-mails

So after following the Ubuntu Postfix tutorial, I tried their recommended test telnet localhost 25 MAIL FROM: person@mydomain.com RCTP TO: person@gmail.com DATA some text here . I received a ...
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2answers
746 views

Openvpn and bad routing = multiple external IP Adresses

I have an OpenVPN server on ubuntu and the client (Openvpn 2.1_rc19) on windows7 x64. The connection is established an I can use it. However not all traffic is routed through the openvpn interface and ...
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2answers
525 views

syslog or splunk forwarding over the internet

I have a web application that is split over a couple of sites in the US and the UK. When we have issues I would like to be able to view the collated error logs from the 2 sites. So I was thinking ...
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2answers
547 views

Server is too busy

We have an advertisement sever which handles loads of requests at a time, however sometimes out of the blues it shows 'Server is too busy' and an 'iisreset' has to be executed in order for the server ...
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2answers
279 views

List of Sysadmin Troubleshooting “Fire Drills”

One of the hardest things to do is to train sysadmins to solve problems (think) in a consistent way, especially when under pressure, the emergency bells are ringing, etc. For some training sessions, ...
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1answer
145 views

Ubuntu guest (virtual box) doesn't show on the router

I installed Ubuntu (as a virtual machine using virtual box) with the openssh server option and apache. When I do ps -ef | grep apache I see apache is running. But: I can't connect to the server ...
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1answer
604 views

Uneven load with Microsoft Network Load Balancing (Server 2003)

I am a network administrator at a small company that uses Network Load Balancing (NLB) to cluster our terminal servers together. Recently, we changed our network setup due to PCI-DSS compliance. ...
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2answers
1k views

VMware workstation 6.5 VMs (Host-only network with static ip address) cannot ping each other

I had specified Host-only network and disabled the dhcp server that comes with the Host-only network. I had setup the following network config, vm1 ip address: 192.168.147.2 netmask: 255.255.255.0 ...