Solved

DNS Forwarding Problems, Win2k3, can't access some websites

Posted on 2004-08-29
7
393 Views
Last Modified: 2012-06-21
Hi, I think I am having a forwarding issue, but can't figure out how to resolve it.  I have a small company network that is using a cable modem to connect to their ISP through a Pix firewall.  The outside IP is static, the inside is DHCP from the server, a Win2003 SBS.  The server does DNS for the internal network, and is configured to forward Internet queries to the 2 DNS servers from the ISP.  The users and server can all get to most websites, but there are some, like www.yahoo.com, that cannot be found.  They can get to email.yahoo.com and search.yahoo.com, but not the www.  I checked the host file, flushed DNS, can't get a response from nslookup beyond the server itself, and tracert times out.  So I added the ISP DNS servers to the IP configuration for the clients, and now they can get to the sites, so I know there is some issue with the Windows DNS.  I'd like to fix this so that the work around isn't neccessary, which it shouldn't be...  I've seen a couple other issues like this when I search the forums, but nothing like a real answer.  If anyone has an idea, please let me know.  Thanks!
0
Comment
Question by:srpoage
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 
LVL 2

Expert Comment

by:brian_appliedcpu
ID: 11928123
try ipconfig /flushdns on the servers and the clients.
Flush the dns on the servers thru the mmc interface
Scavange
Update
Clear the cache on the servers.

Else use a nslookup to query the dns server for who it knows is www.yahoo.com
switch dns servers.
do again for each of the isps servers
Command syntax

C:\>nslookup
> server ns1.twtelecom.net
Default Server:  ns1.twtelecom.net
Address:  216.136.95.2

www.yahoo.com
Server:  ns1.twtelecom.net
Address:  216.136.95.2

Non-authoritative answer:
Name:    www.yahoo.akadns.net
Addresses:  216.109.118.72, 216.109.118.75, 216.109.117.107, 216.109.117.110
          216.109.117.204, 216.109.117.206, 216.109.118.65, 216.109.118.69
Aliases:  www.yahoo.com

Be aware that some dns owners do not allow outside servers to query against them so it is best to use your isp's but sometimes they have issues.  All else fails, call your isp, get someone who knows what they are talking about and ask them to query it.


0
 
LVL 17

Expert Comment

by:RDAdams
ID: 11928127
Ok, you can connect to some websites but not others?  Can you get to their IP addresses www.yahoo.com 216.109.118.66 in the browser?
0
 
LVL 2

Expert Comment

by:brian_appliedcpu
ID: 11928138
RAdams...that would indicate a browser hijack...good thinking.
0
Don't Miss ATEN at InfoComm 2017!

Visit booth #2167 to see the  new ATEN VM3200 32 x 32 Modular Matrix Switch. Other highlights include the VE8950 4K HDMI Over IP Extender, VS1912 12-Port DP Video Wall Media Player  and VK2100 ATEN Control System. Register now with Free Pass Code ATEN288!

 

Author Comment

by:srpoage
ID: 11979833
I figured out the problem- it was the Linksys router having errors.  Took it out and problem gone.  Oh, well.  Thanks all!
0
 
LVL 2

Expert Comment

by:brian_appliedcpu
ID: 12578230
Glad he was able to trace the problem down and isolate it to the router.

bkl
0
 

Accepted Solution

by:
modulo earned 0 total points
ID: 12602391
PAQed with points refunded (250)

modulo
Community Support Moderator
0

Featured Post

Report: Liquid Web beats Amazon, Rackspace & More

A study by performance analyst firm Cloud Spectator finds that Liquid Web beats rivals Amazon, Rackspace and DigitalOcean when it comes to website and cloud application performance.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Resolve DNS query failed errors for Exchange
Don’t let your business fall victim to the coming apocalypse – use our Survival Guide for the Fax Apocalypse to identify the risks and signs of zombie fax activities at your business.
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question