Free IT Book: Stealing the Network

Register

Forgot Password

Site FAQ

Home > IT Answers > Windows Server > Free IT Book: Stealing the Network

MelanieYarbrough

6,315 pts.

Free IT Book: Stealing the Network

Active Directory, Auditing (compliance), Giveaways, IT Books, Network security, Network Security Management, Outlook 2010, Routers, USB drive, Windows Server 2008

This week's free IT book is a little bit different than the ones we usually feature. Stealing the Network from Sygress contains fictional stories of real life possibilities meant to inspire security and technology pros alike to wonder and muse on the what ifs of security vulnerabilities. For a chance to win this thought-provoking series, answer one of the questions listed below and post the answer to your question in the discussion area of this question. Locking down the USB & optical drives on Windows Server 2008 R2 Dentrix 3G and router issues Active Directory network error: "Failed to Contact Domain Controller" How do I sync Outlook 2010 with POP3 server? External IT company auditing security and policies Don't see any questions you're qualified to answer? No worries, just head over to the IT Watch Blog for an additional chance to throw your name in the ring for this great resource. Good luck!

Software/Hardware used:

ASKED: January 3, 2011 2:43 PM

UPDATED: February 3, 2011 4:06 PM

Other Answers:

<a href=”http://itknowledgeexchange.techtarget.com/itanswers/active-directory-network-error-failed-to-contact-domain-controller/#viewquestion”> Active Directory network error: “Failed to Contact Domain Controller” </a>

Answer Wiki:
Check the event viewer on the Domain controllers during the issue (or if you have an idea of the time frame, then you should be able to find any related issues). I’d check the application, system, and security event viewers. See if you have any failed logins during the time period, as this will tell you if the domain controller is actually responding to requests or not. If the issue seems to happen around the same time, or at least once a day, try setting up perfmon on the server to make sure that it’s not an issue with a scheduled task or resource contention or anything like that.

You may also need to check the network. if possible, put a laptop in your rack temporarily, or login from a server that is on the same switch as the domain controller. This will help you determine if it is a network issues (possibly a bad switch/router, or a bad cable somewhere in the mix. You may need to work backwards while the issue is happening.

Without more information on the issue, it’s hard to pinpoint a good troubleshooting step so you’ll have to start pretty broad since there could be any number of reasons why your seeing this issue.

<center></center><a href=”http://itknowledgeexchange.techtarget.com/itanswers/active-directory-network-error-failed-to-contact-domain-controller/#viewquestion”> Active Directory network error: “Failed to Contact Domain Controller” </a>
Answer Wiki: 
Check the event viewer on the Domain controllers during the issue (or if you have an idea of the time frame, then you should be able to find any related issues). I’d check the application, system, and security event viewers. See if you have any failed logins during the time period, as this will tell you if the domain controller is actually responding to requests or not. If the issue seems to happen around the same time, or at least once a day, try setting up perfmon on the server to make sure that it’s not an issue with a scheduled task or resource contention or anything like that.
You may also need to check the network. if possible, put a laptop in your rack temporarily, or login from a server that is on the same switch as the domain controller. This will help you determine if it is a network issues (possibly a bad switch/router, or a bad cable somewhere in the mix. You may need to work backwards while the issue is happening.
Without more information on the issue, it’s hard to pinpoint a good troubleshooting step so you’ll have to start pretty broad since there could be any number of reasons why your seeing this issue.
<center></center>