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

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4answers
278 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 ...
9
votes
5answers
232 views

Program does not run properly as Scheduled Task

Situation I have a batch script that prepares some files, executes a program (.exe) and then deletes said files. This task should run hourly, so I'm trying to configure this using Scheduled Tasks. ...
1
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1answer
783 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 ...
0
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0answers
24 views

How to setup Postfix with exchange being the relayhost

We are trying to setup Postfix for the outgoing emails through exchange relay server. We have configured the Postfix but not getting success in making it work so users can run emails from the console ...
1
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1answer
42 views

MySQL server hangs without reason

I have a server running web site with back-end database MySQL (more specific - 5.5.37-MariaDB, for debian-linux-gnu on x86_64). Sometimes it stops accepting connections and web site scripts report ...
5
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10answers
31k views

Unable to logoff, disconnect, or reset terminal server user in production environment

I'm looking for some ideas on how to disconnect, logoff, or reset a user's session in a 2008 Terminal Server (unable to login as the user either as it is completely locked-up). This is a production ...
0
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1answer
25 views

how to find cause of io spike

Everyday at around the same time, the IO usage on the server where our mysql slave goes up to 100%. I have setup a script that takes IO information every five minutes so I can find out why this ...
0
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2answers
33 views

Remote port forwarding through EC2 not working, though address is in use

I have a remote machine running a server which I'd like access to locally. However, I can only SSH into the machine, not use any other ports. I booted up an Amazon EC2 instances and opened all its ...
0
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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 ...
0
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0answers
28 views

Find cause of unresponsive Ubuntu 14.04 KVM host

I'm hoping someone can point me in the right direction on a very puzzling problem. I've got an older server running Ubuntu 14.04 that serves as a virtual host for some small virtual (KVM) machines. ...
0
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0answers
18 views

Troubleshooting mySQL load problems

SSD VPS with one Magento site on it. Recently whenever I make a save to a product, the mysql QPS skyrockets and server load goes up tenfold for several minutes (even though the admin page loaded long ...
1
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1answer
137 views

Troubleshooting blocked/dropped ports on Sonicwall firewalls

Short of enabling packet capture/monitor on specific rules/policies, is there an easier way to see or to setup a Sonicwall to show blocked ports/services (realtime or as a report)? I think packet ...
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2answers
234 views

Windows Search Indexer Uses High CPU Usage

We have a Windows Server 2012. From time to time the Windows Indexer has too high CPU usage. What could cause this and how could it be solved. It runs perfect several weeks and then it takes too much ...
0
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1answer
61 views

How to perform an assessment of an existing network? [closed]

I work as an IT guy for a small company with 2 offices. Currently we are in the process of moving our entire network infrastructure to a different host because we are running everything on extremely ...
0
votes
0answers
45 views

“Network name cannot be found” just on some shares

We had an Windows XP in a VMWare virtual machine joined to an Active Directory domain. DC servers are Win2008 and the workstations have static IP addresses. Because the HDD with that vm (called P2) ...
2
votes
1answer
181 views

vmware virtual machine keeps freezing

Strangely I have a virtual machine that keeps constantly freezing for some seconds or minutes. On the OS side, the CPU and memory used are quite low. On VMWare side, it's the same, the machine never ...
1
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1answer
57 views

Errors when installing rootsh on Ubuntu

I'm installing rootsh 1.5.3 on Ubuntu 10.04 LTS (following this guide) and I get: $ make && make install Making all in src make[1]: Entering directory `/tmp/rootsh-1.5.3/src' make all-am ...
13
votes
3answers
22k views

What is the ibdata1 file in my /var/lib/mysql directory?

Logging in to my Webmin control panel, I noticed that virtually all of my disk space is full. I searched for the ten largest files/ directories on my system and found that a file called ibdata1 is ...
2
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1answer
65 views

Non-invasive way for our network team to run ping/tracert/etc from various servers

In troubleshooting connectivity issues, our network team lacks the rights on our servers (Windows and RHEL) to connect and test connectivity (for example, when tweaking a firewall rule, a ticket ...
0
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1answer
61 views

Frame-Relay Direct Serial, can't ping

I am working on my packet tracer lab. I have a bit long or series of questions but may be short answers can solve my problem. I am using 3 routers. all connected to each other using serial cable. R1 ...
2
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4answers
1k views

IBM Xseries 3400 only working while power button holding pressed

I have an IBM xSeries x3400 Intel Xeon server which only works while someone holds in the power button. My server stopped working and I sent it to IBM Service. After a few hours they told me I could ...
4
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2answers
424 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...
0
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0answers
193 views

Can't boot VM after P2V or ghost - Linux 2.6

I got this old machine that runs on a p2 400 and a Linux Debian 3.1 with kernel 2.6.8 and since it has modified binaries due to internal undocumented changes in the code, migrating off manually isn't ...
0
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0answers
60 views

Remote SQL Server Connection works from SSMS but not from Application

We are troubleshooting a weird issue with our SQL Server 2008 server. The application server runs a windows service that makes a DB connection via a connection string in its config file, and we end ...
2
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1answer
87 views

server hangs randomly without log entries

My physical server hangs randomly and I do not get any log entries during that time. So I let a script run: while true; do date >>/tmp/dates; sleep 1; done & disown After some minutes the ...
1
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1answer
143 views

Determine cause of connection refused on surveillance video unit

We have 3 similar surveillance video units. Each has a server that should be available on ports 80 and 443. One unit has suddenly become unavailable on port 80, and I'm working to determine what could ...
0
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2answers
106 views

How to troubleshoot network from customers perspective?

We have a web application that we host that is customized for multiple customers. Each customer accesses their version of the site via their own custom subdomain. We are running into an issue where ...
53
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8answers
30k views

Environment variables of a running process on Unix?

This is to troubleshoot some problems related to environment variables .. On Windows, I could do this by using tool such as ProcessExplorer to select particular process and view values of each ...
3
votes
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 ...
2
votes
3answers
13k views

Best way to troubleshoot apache not starting?

We have recently gotten a backup server to mirror all our data onto in case the primary server goes down. I've gotten all the sites data updated through rsync, and all the apache config and databases ...
0
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1answer
206 views

MySQL 5.0 not logging aborted connections in general log

I know there is a bug in MySQL 5.0 which prevents aborted connections from being logged in the error log (http://bugs.mysql.com/bug.php?id=24761). However, aborted connections should still be logged ...
0
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2answers
927 views

Hyper-V Guests suddenly stopped working

Here's my configuration: Windows Server 2008 R2 Standard as a host OS, and two guests VMs running the same exact OS. Yesterday, Trial Activation on all OSes has expired and quite naturally all ...
1
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1answer
55 views

Advice on web server performance troubleshooting is needed

I'm renting a virtual CentOS based server where I have about 5 active sites running. Several months ago I noticed a significant performance degradation in how my sites are running. First symptom was ...
1
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0answers
234 views

How to prevent Windows Server 2008 R2 from automatically shutting down applications?

I have been running various processes over night on a Windows 2008 R2 AMD64 SP1 virtual server share via a VPN connection and remote desktop. Recently, I have been noticing that when I return in the ...
0
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2answers
398 views

How can I find out what Zimbra process (specifically “b”) is doing?

My Zimbra mail server (8.0.2 Community Edition) recently started to spawn an interesting process called "b". top - 11:04:44 up 19 days, 18:47, 1 user, load average: 6.25, 6.38, 5.57 Tasks: 131 ...
0
votes
2answers
866 views

How do you troubleshoot a PPTP+VPN+RDP freeze-up?

The symptoms are: I am at home. I am trying to dial a PPTP VPN. It connects fine. Pinging from command line in windows shows about a 30% ping success rate when the PPTP vpn is up, 100% ping success ...
3
votes
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 ...
1
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2answers
3k views

Windows Server 2003 DCDiag error message “delegation is broken for foo.com.foo.com on dns server”

It started as a simple diagnostic: dcdiag /c when it ran it gave me the following error from the DNS portion of the DCDIAG test delegation is broken for foo.com.foo.com on dns server on dns ...
0
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0answers
316 views

How to troubleshoot occasional Apache 500 errors?

I have GET and POST requests, both HTTP 1.0 and 1.1, to diverse URLs, mostly running Wordpress(1), which occasionally fail with a 500(2). No user has ever encountered a 500 themselves, nor have ...
3
votes
1answer
60 views

Virtual Server HDD shrinks without apparent reason

We have a virtual hosted Linux server, and in the last few months every now and then the HDD shrinks from 400GB down to the exact byte count that is in use. All existing data can be downloaded and ...
0
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1answer
244 views

Why my 2nd ip from traceroute is not answering the ping anymore? [closed]

My Internet is really laggy today, I did a tracerout and I realize that I'm having no answer from an ip at the beginning of the traceroute. see: Tracing route to 12.129.202.154 over a maximum of 30 ...
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votes
2answers
474 views

Port in Public IP can't be accessed [closed]

I have a local ip (xxx.xxx.xxx.xxx) and also a public ip (yyy.yyy.yyy.yyy) for my local server. I host a website in the local server on port 5555. I can open my website from the local ip ...
0
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0answers
32 views

Switched google apps domains; now certain emails aren't delivered?

We recently moved from one google apps domain to another, and used Backupify to transfer email accounts, etc. Since then, we've had intermittent issues with customers not receiving emails or having ...
0
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0answers
44 views

Vserver CentOs 6.4

I have the following problem. I have a server based on CentOS 6.4 is running the Vserver. I did update the kernel to version 2.6.32.14. Unfortunately, after rebooting the server receives the "kernel ...
4
votes
4answers
263 views

Troubleshooting wireless network in a 4000 square feet office

I work for a non-profit organization in a 4000 sf office with 30 staff. All laptops are connected to the network wirelessly. We have one switch (TP-Link TL-SF1008D Ethernet Switch) and three routers ...
0
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1answer
33 views

temporary hang with remote shells keeping the connection

We are having some trouble on our machine having Red Hat 6.2 Enterprise. For just about 1 minute this is what happens: during that minute my SSH shell are frozen and we cannot do anything at the ...
0
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1answer
40 views

Unable to connect to IDAQ database from php

I'm having difficulties migrating a site to the clients host. The host is idaq.com. I've searched for ages and have found no actual answer or even close to one. I'm using the following connection ...
-1
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2answers
2k 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 ...
11
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1answer
394 views

Harddisks falling offline for unknown reason

I have 7 systems running the setup below. Now and then a different disk falls offline, but on closer inspection the disk is good and not faulty and works flawlessly for at least another year. Since ...
1
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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 ...