The troubleshooting tag has no wiki summary.
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12 views
How to troubleshoot intermittent winsock 10054 errors on Windows Server 2003 SP2
We are getting 10054 errors in a couple of our applications on one server running Windows Server 2003 SP2. This happens intermittently, and we also have other similar servers running the same ...
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1answer
25 views
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 ...
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0answers
15 views
Hanging between Oracle client and Shadow Process
We are having an occasional (ie non-reproducible) issue where the Oracle client process (EnterpriseOne kernel process) and the Oracle shadow process seem to get out of sync. I perform a stack dump of ...
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1answer
54 views
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 ...
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1answer
97 views
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 ...
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58 views
Slow connection to a shared .mdb file over a LAN on some machines only (SOLVED)
A single client program on each of about 10 computers are sharing a .mdb file on a windows 7 machine.
The network is cabled and has a switch.
For no obvious reason the connection on 2 of these ...
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3answers
68 views
Application getting VERY slow only in the morning: tools to track the culprit?
I have two Ubuntu Servers: one acting as db server (mysql) and file server and the application server.
Using this three service an application has been working flawlessly for months.
Now we've found ...
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1answer
42 views
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 ...
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2answers
69 views
how do I troubleshoot rdp
I have one Windows XP SP3 pc on the domain that I cannot rdp into.
The xp pc is enabled for rdp sessions.
Port 3389 is open in the firewall.
There are no errors in the event logs.
I have tried to rdp ...
2
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1answer
43 views
When troubleshooting a complex issue is there a reason to go with an additive vs subtractive troubleshooting methodology
TLDR: I am interested in finding out whether there is a reason to select an additive approach to troubleshooting over a subtractive approach, or vice-versa when trying to troubleshoot a problem with ...
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1answer
69 views
Internal e-mails
We need to send mails from our domain (assume this is example.com) to our self. Now, the 'incoming' mails are handled by another server (from Google). We can send mails through sendmail to external ...
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2answers
250 views
Putty + Bash + Screen, up arrow for history not working (Ubuntu 11.10)
I have a fresh install of Ubuntu Server 11.10 that I am logging into SSH via PuTTy. When I am inside screen, I cannot use the up arrow to recall bash history (though this works outside of screen). I ...
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2answers
62 views
How to troubleshoot many failed pageloads?
I've had a few cases in which the homepage of one of my sites wouldn't load in the browser. The site is running on django/fastcgi/nginx.
It was difficult to reproduce so, in an attempt to understand ...
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1answer
55 views
Troubleshooting potential compromised server from Brute Force SSH Attack [closed]
Possible Duplicate:
My server's been hacked EMERGENCY
So I noticed some files/folders on my webserver and investigating leads the fact that a brute force attack via SSH was done on my ...
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0answers
16 views
Debug squid: when accessing the internet no username is request and user gets blank page
Today we've turned on our pc and we couldn't get on the internet.
Squid simply gave back a white page without login request.
I've cleaned and rebuilt the cache, restarted the server but no luck.
...
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1answer
38 views
nginx redirecting for no reason?
This was really annoying and now i see when it happens. If <ip>/NAME exist in /var/www (/var/www/NAME) nginx will give me a redirect to www._.com/NAME/ (note the slash and lack of url) which is ...
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1answer
118 views
Trying to bridge NIC. What does this error mean?
I would like to bridge between br0 and tap0 for my OpenVPN server, but I get the error at the bottom of this post.
Background
The server have one physical eth0 with IP xxx.xxx.68.58.
The bridge ...
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1answer
76 views
Troubleshooting Nagios alerts; aka. Why aren't my alerts firing?
I'm attempting to add email alerts to an existing Nagios install. I've been using the web interface to keep an eye on some non-critical systems for a few months and it's been running well; warnings ...
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3answers
55 views
Ubuntu 10.04 install is missing /etc/rc0.d, is there a quickfix?
I have no idea how this happened, but /etc/rc.*/ is simply missing.
As a result, aptitude and apt-get don't work right anymore.
Is there a quick-fix for this? I really don't want to reinstall the OS ...
8
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3answers
155 views
Performing root-cause analysis
I want to learn more about how to perform root-cause analysis. More times than not, our department tells the user to try rebooting (thier Windows XP system), which actually "fixes" a good number of ...
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0answers
28 views
Why is IIS 6 reverting to asp.net 1.1 from 2.0
We have been having some really strange issues on our web servers recently with the latest being our website applications in IIS6 reverting from asp.net 2.0 to asp.net 1.1 on Windows 2003 server.
The ...
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2answers
418 views
SQL Server 2008 CPU usage goes to 100% - troubleshooting help needed?
I have a fairly powerful database server having SQL Server 2008 R2 installed. There is only one database on it which is being accessed from 2 servers (around 5/6 applications). The problem is as soon ...
0
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1answer
41 views
Proxy-Connection Header associated with failed connections
I work with microprocessor devices that have/run a micro webserver.
I have two of these devices set up so that they can be accessible to/by the Internet - I'll call the devices "A" and "B".
...
1
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1answer
69 views
End-user SSL certificate management workflow
We have an internal website, served from behind HTTPS with client certificates.
Website users are non-technical persons, working remotely. They use Windows (XP, Vista, 7) and OS X (10.5, 10.6, 10.7). ...
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3answers
118 views
Ubuntu troubleshooting
I have a computer which keeps becoming unreachable, and a restart fixes the problem. It's under somewhat heavy load (high cpu, and high ram usage), but appears for the most part stable.
What's a good ...
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2answers
271 views
Server is rebooting unexpectedly, strange kernel messages in log file
I have a server running Ubuntu 10.04 that is rebooting several times a day it seems, and I can't figure out why. It doesn't appear to be a graceful reboot either, because some of the services complain ...
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2answers
117 views
SSH closes connection when key is accepted
In server's auth.log:
Failed publickey for agladysh from MYIP port 61313 ssh2
In ssh -vvv:
debug1: Offering public key: /Users/agladysh/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a ...
0
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1answer
37 views
LAN - troubleshooting
I have 2 clients on my LAN that I'm trying to get to "see" each other. The first as follows
Computer1
IP 172.21.62.230
Subnet 255.255.255.224
Default gateway 172.21.62.225
Preferred DNS server ...
0
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2answers
111 views
Troubleshooting firewall and routing on Linux
Are there any tools or API hooks for troubleshooting iptables or routing on Linux? (besides the obvious -j LOG)
In other words: what to do when tables with 200 or 300 firewalling rules after adding a ...
0
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1answer
37 views
VMWare Workstation connection problems
Our old setup (which worked):
On workstation W-1 (WinXP - 64bit) we had two virtual machines (VMWare 6.5) V-1 and V-2 (both with WinXP-32).
All of them had a different IP static address, V-1 and ...
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334 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
433 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
87 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 ...
0
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1answer
212 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
25 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
60 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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567 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 ...
0
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1answer
184 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 ...
2
votes
2answers
168 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 ...
0
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1answer
142 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
265 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 ...
1
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1answer
136 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 ...
1
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1answer
85 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 ...
0
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1answer
69 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 ...
1
vote
1answer
183 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 ...
1
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1answer
117 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 ...
1
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1answer
347 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 ...
0
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1answer
201 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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0answers
101 views
Debugging / troubleshooting .inf driver install in Windows
I'm trying to install a graphics driver in a laptop with Windows 7 but the setup fails with a timeout. I checked the setup log but it does not include any details about the .inf installation. It only ...
0
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4answers
883 views
Open ports broken from internal network
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 ...
