DNS and NDNS issues

Microsoft Windows xp professional w/serv...
April 18, 2010 at 19:12:25
Specs: Windows XP
I have the same problem as the guy who was having DNS/NBNS issues.
I have one system that uses NDNS lookups for every internet site I want to see (IE or Firefox). The system can ping any IP address and will not resolve any DNS lookup.
The trigger for this was (believe it!) was I set a proxy address for a UK based proxy server, and when I removed it later, the system would not get on the internet unless the proxy was set back up.

See More: DNS and NDNS issues

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#1
April 18, 2010 at 22:35:11
First, check the hosts file for curious entries.

Also, what does a tracert to an internet ip address show?

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#2
April 18, 2010 at 23:54:01
tracert cannot resolve the name, but it will trace and IP address.
I can ping the IP but not the name.

Hosts and Lmhosts have no unusual entries. Both IE and Firefox have had all proxies disabled.

wireshark shows that any attempt to use a DNS is being sent out as a local subnet broadcast (192.168.0.1/24) and is an NBNS query.

Thanks for the questions.


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#3
April 19, 2010 at 00:03:49
So at the command prompt try:
arp -d

and

ipconfig /flushdns

Then give tracert another try.

Btw: What was the first hop on tracert <ip address>?

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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Related Solutions

#4
April 19, 2010 at 01:01:11
Did the f;ushdns same problem.

I can't get the first hop when I use the domain name, tracert needs to resolve the dns before doing the pings.
When I use an IP address the first hop is my local gateway 192.168.0.1


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#5
April 19, 2010 at 08:25:56
So you simply have a DNS problem.
What DNS server is shown on:
ipconfig /all

Best is, you'll post the output of ipconfig /all.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#6
April 19, 2010 at 09:27:52
Not so simple. I'll get the ipconfig /all output later.

When I see the packet monitor output, any action that would normally produce a dns request, actually produces a netbios name service request.

I will get that output also.


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#7
April 19, 2010 at 09:30:59
ipconfig /all > ipconfig.txt

Open the text file and use copy and past for posting it here.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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