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

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2
votes
1answer
501 views

Machine with bonded interface does not receive multicast packets on all slave interfaces

After an upgrade of our machines from RHEL 6.6 to RHEL 6.7 we observed a problem where 4 of our 30 machines only receive multicast traffic on one of their two slave interfaces. It is unclear if the ...
0
votes
0answers
25 views

VoIP NAT to connect to companies of the same ip address range together

I am currently using packet tracer to configure the network for Company A. I have configured DHCP and telephony service successfully but the problem I'm facing is when company A tries to contact ...
2
votes
3answers
452 views

80% memory utilization on server- is this just caching?

Memory utilization is very high on this 2008 R2 server, but I think it might just be caching RAM- performance on the server is fine and CPU utilization is very low. It is running DFSR which I believe ...
2
votes
4answers
3k 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 ...
0
votes
1answer
63 views

Cannot connect to internet after a power cut yesterday

I work at a small company, we have set up our LAN using an ASUS RT-N18U. We are in a small office as part of a business park, our network comes in over wire, as part of a package supplied by the ...
0
votes
2answers
39 views

Troubleshoot if /etc/init.d script would run on startup, without actually rebooting?

I have this script in /etc/init.d that I want to know if it will be run when the system reboots. Is there a way to "simulate" the conditions of a reboot to see if the script will actually be invoked ...
1
vote
1answer
60 views

How to troubleshoot a web server?

NOTE: This is being asked, not because it is a good question (in my personal opinion, it's not), but because I've noticed a lot of questions on here boil down to this question, and since I'm sick of ...
7
votes
15answers
68k 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 ...
2
votes
6answers
1k 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 ...
0
votes
0answers
66 views

Cannot install Azure Backup Server / DPM

I am trying to install Microsoft Azure Backup Server software, which is basically a clone of DPM, on a Windows 2012 R2 Azure VM. For some reason every time I get to the agent registration portion of ...
1
vote
0answers
46 views

Sun X4150 not powering up via power button

What I have I have a Sun Server X4150 ( https://docs.oracle.com/cd/E19121-01/sf.x4150/820-1852-13/doradi-overview.html ) which I have set up in a research environment (I'm testing various OSs and ...
105
votes
9answers
55k views

Environment variables of a running process on Unix?

I need to troubleshoot some problems related to environment variables on a Unix system. On Windows, I can use a tool such as ProcessExplorer to select particular a process and view values of each ...
0
votes
1answer
81 views

Couchdb service shuts down a second after start

I'm having problems getting the couchdb service running. When I start it, it only lives for a second or so before shutting itself down. Here's an example - first a status command showing it's ...
0
votes
1answer
30 views

Failure installing and running couchdb on Lubuntu

I'm trying to get started using CouchDB on a laptop where I recently installed Lubuntu (15.10). I'm having strange issues.. Yesterday, I installed CouchDB (sudo apt-get install couchdb) and it ran ...
-4
votes
3answers
113 views

How to debug and prevent flaky unreliable IT environment? [closed]

I am not an IT admin, I'm a software developer (microsoft stack) and I'm trying to understand what is wrong with the IT environment of one of our customers. We have deployed our client\server ...
2
votes
1answer
2k views

Fortinet: Is there any equivalent of the ASA's packet-tracer command?

I would like to know if there is not Fortigates an equivalent of the packet-tracer command that we can find on the ASA. Here is an example of execution for those who don't know it: NAT and pass : ...
0
votes
1answer
101 views

How to Handle Routes of Two Laravel Projects on One Domain or Server?

I'm working on a project divided into two separate parts. Part one, the bigger part, is in Laravel 4.2. Part two, the shorter part, is in Laravel 5. Both are on the same server. My goal is to access ...
0
votes
1answer
34 views

Port forwarding https request to other server.

I've been asked to fix a issue but I did not configure this server so I could not figure out what's happening here.. www.mywebsite.com connects to 20.20.20.20 (Webserver) ...
2
votes
0answers
71 views

Website inaccessible until host is pinged from client (on a class A subnet)

There is this really weird issue on the internal network, this happens constantly to "random" machines. Machine (client) boots up, goes to ...
0
votes
1answer
26 views

Server response not being received

I have a python program that sends requests via a socket connection to a local 3rd party application which in turn forwards my request to a server. The server response then makes it's way back to my ...
0
votes
0answers
47 views

Netscreen VPN UP/DOWN due to loopback address source monitoring

I am dealing with a problem with Netscreen VPN. Topology is basically Server Side ーー> (Agg2)Trust/Untrust(Agg1)ーー> ーー> Remote Office (Yamaha) 100.66.xx.0/24 ーー> Netscreen VPN ーー> Internet ーー> ...
2
votes
3answers
7k views

How to change SMP affinity of an IRQ on Ubuntu PV domU inside Xen XCP?

I'd like to change IRQ SMP affinity for reasons, outlined in this question: CPU0 is swamped with eth1 interrupts But I can't — I see Input/output error when I try to write to ...
1
vote
1answer
60 views

Find source of sleeping mysql connections

We have a very large number of PHP scripts running on our server that do a variety of things. Lately I've noticed that when looking in PHPMyAdmin there are a large number of connections to our MySQL ...
0
votes
1answer
253 views

Windows 7 (32-bit) Sysprep not running Unattend.XML but no error in logs

I am trying to Sysprep a Windows image that will run on identical hardware. The issue I'm facing is that the Unattend.XML file is somehow not running whatsoever, but the logs itself do not say ...
11
votes
8answers
34k 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
vote
1answer
237 views

End-user SSL certificate management workflow [closed]

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). ...
3
votes
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 ...
0
votes
1answer
7k 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 ...
0
votes
0answers
67 views

Intermittent Network Instability

I have an office network being run by a Linksys WRT1900AC, and I'm experiencing significant, but intermittent issues. I have between 15 and 20 devices connected to it, including computers, phones, ...
1
vote
3answers
11k views

How to clear the Offline Files cache on Windows XP

We had a server rename/migration and I was using the Offline Files feature on Windows XP SP2. Every so often, my "Offline Files Status" icon appears in my Taskbar and let's me know that the old ...
0
votes
0answers
195 views

one or more threads of java.exe are waiting to finish network I/O windows 2012 server

I have installed jdk-8u45-windows-x64 on my windows 2012 server. I am seeing that in task manager java.exe is utilizing high CPU. I check he detail in task manager via right clicking on java.exe then ...
4
votes
1answer
2k views

windows update - strange behaviour using up all CPU

I have a windows 2008R2 server which has had windows update go mad. Last night it started pegging the CPU @ 100% and using 1GB RAM. Killing the Windows Update service took the CPU and MEM back to ...
2
votes
1answer
171 views

Bind9 recursive queries have intermittent very long response times

I'm running BIND 9.8.1-P1 caching server on Ubuntu 12.04 LTS on kernel 3.2.0-86-generic-pae. I've been banging my head against the wall trying to figure this out for weeks and I just have no idea ...
5
votes
3answers
39k views

How to investigate unexpected Linux server shut down?

In a new Xeon 55XX server with 4xSSD at raid 10 with Debian 6, I have experienced 2 random shut downs within two weeks after the server being built. Looking at bandwidth logs before shut down does not ...
12
votes
7answers
10k views

High CPU utilization but low load average

We are running into a strange behavior where we see high CPU utilization but quite low load average. The behavior is best illustrated by the following graphs from our monitoring system. At about ...
1
vote
0answers
734 views

Slow connection to a shared .mdb file over a LAN on some machines only

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 ...
1
vote
1answer
1k views

alfresco, tomcat crashes on startup, no clues in the logs

I have installed an alfresco community edition 4.0 on a Win 2003 R2 with 3GB of RAM. I've used alfresco for some hours, i've created a user, uploaded some documents. But now, restarting it, tomcat ...
0
votes
0answers
283 views

Can ping but can't RDP or access UNC path ofter reboot Server 2008 R2

I rebooted a server after a Symantec installation. I did this from home and have no way to physically connect. Rebooted the server and now I cannot access it from UNC path or RDP. Using a VPN to ...
0
votes
0answers
19 views

HP P4014n will only print letter size

Had a user using HP P4014n locally, device suddenly stopped printing, I removed the printer, and uninstalled and reinstalled the printer drivers. Then readded printer. Now it will not auto-detect ...
-1
votes
1answer
88 views

IPv6 connections from outside the LAN are timing out; what is blocking the connection?

as I understand with ipv6 there is no NAT so every client on a network will get a different public ip address (so there is no need for port forwarding). so I checked on my network and indeed every ...
4
votes
5answers
553 views

Tracking down load average

The "load average" on a *nix machine is the "average length of the run queue", or in other words, the average number of processes that are doing something (or waiting to do something). While the ...
0
votes
1answer
59 views

How to find Certificate signing request information?

I need to update certificates for the Apache servers (Linux Servers RHEL6) and it appears our team doesn't know the correct information for the CSR. Is there a way to find the correct information ...
2
votes
2answers
220 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 ...
14
votes
8answers
22k views

Troubleshooting a “slow” network

We've all had a complaint that the "network" is "slow" at some point: might be localized to one room (switch) or one computer, might just be Internet (DNS? Browser issue?), might be just one ...
0
votes
1answer
608 views

Redhat Satellite 5.5.0 Remote Command Setup issue

I have setup Remote Commands on Redhat Satellite version 5.5.0 and trying to understand how the schedule works. The Remote Commands are already working on the clients but it appears that when we try ...
2
votes
1answer
911 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 ...
0
votes
1answer
144 views

Open VPN troubleshooting

I'm trying to set up a site-to-site VPN connection between 2 of our offices. The VPN servers i'm using are 2 "Edgerouter lite" and the tunneling software i'm using is OpenVPN. This is how the setup ...
3
votes
5answers
10k views

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

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 ...
0
votes
0answers
131 views

What would cause /app/code/core/Mage/Checkout/Model/Type/Onepage.php to truncate? [closed]

This morning we started getting calls from customers stating that the checkout page was returning a white screen. We turned on errors in Magento and were greeted with the following error: Parse ...
0
votes
0answers
68 views

Network services abruptly stop working on win server 2k8

One of our windows servers has started acting up. All network services from roles on the server just stop working all of a sudden, untill the server is restarted. the issue occurs every other week or ...