Why is nslookup returning a private address for my server?

[yert33]

I have servers around the country. I host my own DNS servers for my domain (SOA records).
On all my servers except one, when I do an nslookup on the server name ON THAT SERVER, I get the public address returned. On one of my servers, I get it's private address.

I checked the DNS A record for this server on my DNS servers and it has the public address as do all the others.

What up?

 

[ChrisAC]

Are you behind a Pix firewall by any chance?

Chris.

**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************

 

[yert33]

Certainly am. A 520. But so are all my other servers that are repoting the correct public address.....

come back....

 

[yert33]

Also, I thought that maybe I needed a "fixup protocol dns maximum-length 512" statement in the PIX to fix this issue. But evidently the firewall version I have, 6.3(1) doesn't support this command.

Thanks for replying, iproute.

 

[GlenJohnson]

Is this something new? If it is, do you have any error messages showing in the log files? That's usually the first place I start looking. Good luck.

Glen A. Johnson
If you're from Northern Illinois/Southern Wisconsin check out Tek-Tips in Chicago, Illinois Forum.

TTinChicago

http://www.johnsoncomputers.us

 

[ChrisAC]

6.3(1) has a bug which causes exactly this. I have a 506E with the same version and have the same problem. It basically applies and 'alias' to that IP address that the Pix has a static translation for despite the fact that it's not in the config. An upgrade should fix it, although I haven't actually tested it yet.

Chris.


**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
**********************