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Old 08-09-2002, 03:07 AM   #1
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Registered: Jun 2001
Location: Malaysia
Distribution: Red Hat
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Unhappy setting up DNS behind a firewall.....

I 've setup a DNS on Redhat 7.3 and i 've properly configure all those settings to point to the private ip 10.X.X.X. Tested the DNS, and it resolve all the queries i sent using tools like "nslookup" or "dig". I got few zone file within that DNS and they are working well. The /etc/hosts file is configure to point to the internal IP namely: localhost
10.X.X.X nameserver

The problem is that when i put the new DNS behind a firewall, after opening port 53(DNS port), i did a testing to the DNS, it refuses to resolve my nslookup query or dig query even after I 've NAT the private IP 10.X.X.X to a public IP 192.X.X.X.

Not sure what else am i missing. All i want to do is have the DNS sitting behind a firewall and not having a split DNS.

Please help...........
Old 08-10-2002, 05:09 PM   #2
Registered: Nov 2001
Location: Spain
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I'm no expert on this but I think you need to make sure that the NAT translation is static. No doubt there's a thread somewhere (try looking in networking forum).
Old 08-10-2002, 10:41 PM   #3
Registered: May 2001
Location: India, Kerala, Thrissur
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Nat is of 2 kinds. If you did snat 10.* to 192.*, it is not enough. On the other end dnat 192.* to 10.* . And on m/c connected to that end use 192.* as the nameserver address.
Old 08-10-2002, 10:43 PM   #4
Registered: May 2001
Location: India, Kerala, Thrissur
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You may have to add route to 192.* m/c through your firewall if you are not able to ping 192.* from clients on the other end.


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