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Community Member

DNS REVERSE LOOKUP PROBLEM PIX 515E

Gentlemen, I really need your guidance. I have a situation whereas I cannot do DNS REVERSE LOOKUP thru my Pix 515E. There are sites on the .mil (Niprnet), which I have here, that require a DNS REVERSE LOOKUP. When I attempt to go to the site, it gives me the DNS Error and reflects my PAT Address of my Firewall. I have tried everything that I know, everything that I have researched on the Cisco web site, and to no avail, I still cannot get DNS REVERSE LOOKUP THRU MY Firewall. I can only access those particular sites from my two OUTSIDE DNS Servers. Yes, my DNS Configurations inside and outside are correct. Any Help would be greatly appreciated. I have exhausted all possibilities. Thanks in advance! Ron

3 REPLIES
Silver

Re: DNS REVERSE LOOKUP PROBLEM PIX 515E

do you have a reverse dns record defined for the ip address on the PAT ip address?

Community Member

Re: DNS REVERSE LOOKUP PROBLEM PIX 515E

YES!

Gold

Re: DNS REVERSE LOOKUP PROBLEM PIX 515E

Hi Ron,

Have you seen this doc :

http://www.cisco.com/warp/public/110/pixperformance.html#reversedns

The above is for troubleshooting Reverse DNS Lookup.

Regards - Jay.

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