Problems with DNS resolution

  • Thread starter Thread starter Ibrahim Awwad
  • Start date Start date
I

Ibrahim Awwad

Dear Colleagues,

Suddenly I stopped having the ability to connect through the VPN, I tried to
trace the issue and I found that all DNS requests when I connected to my VPN
is redirected to local host '127.0.0.1'
But when I ping any host inside the network by IP address it works ok.
I tried without the VPN connection, and I noticed the same behaviour, any
unknown host, it resolve it to <host.mydomain.local> mydomain here is my
company domain, and it either give me 127.0.0.1 or 0.0.0.0 !!!!

I tried to Flush DNS resolver, reset the TCP/IP stack and reset the WINSOCK
also, nothing worked, still the same.



--
*********
IT Manager
DeLaval Ltd.
Cairo-Egypt
*********
|-----------------------------|
|Islam is peace|
|-----------------------------|
 
Hi Bob...

Well the DHCP havn't chaged at all, but as you like the settings is as below:
Physical Address: 00-19-B9-6A-1B-26
IP Address: 192.168.1.100
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
DHCP Server: 192.168.1.1
Lease Obtained: 23/03/2009 17:02:08
Lease Expires: 31/03/2009 17:02:08
DNS Servers: 192.168.1.1
|-----------------------------|
|Islam is peace|
|-----------------------------|
 
Hi Bob,
Please see below some trials to query the DNS, I will put my remarks between
**

C:\WINDOWS\system32>nslookup
Default Server: dns-cache.tedata.net
Address: 163.121.128.134 *ISP DNS*
dell.com
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: dell.com.delaval.local *delaval.local is our company domain*
Address: 0.0.0.0
dell.com. *Please notice the '.' at the end of the address*
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: dell.com *now you can see the correct reply*
Addresses: 143.166.83.38, 143.166.224.244
cnn.com *without '.'*
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: cnn.com.delaval.local
Address: 0.0.0.0
cnn.com. *With '.' at the end??*
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: cnn.com
Addresses: 157.166.224.25, 157.166.224.26, 157.166.226.25, 157.166.226.26
reps.net.
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: reps.net
Address: 68.178.232.100
repsjhhhd.net. *nonexisting domain*
Click to expand...
Server: dns-cache.tedata.net
Address: 163.121.128.134

Non-authoritative answer:
Name: repsjhhhd.net
Address: 0.0.0.0
*************************
This is my first time to face such problem :(

BR
--
*********
IT Manager
DeLaval Ltd.
Cairo-Egypt
*********
|-----------------------------|
|Islam is peace|
|-----------------------------|
 
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