setting up DNS behind a firewall.....

archangel · 08-09-2002, 03:07 AM

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:

127.0.0.1 localhost.localhostdomain.com localhost
10.X.X.X nameserver.abc.com 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...........

JamesF1 · 08-10-2002, 05:09 PM

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).

sarin · 08-10-2002, 10:41 PM

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.
--Sarin

sarin · 08-10-2002, 10:43 PM

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.
--Sarin