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New Member

Understanding the "dns" argument in PIX's "NAT" cmd

Hi,

I am using NAT to resolve DNS queries originating from our DNS Servers.

I am trying to understand the difference between

nat (<interface>) 0.0.0.0 0.0.0.0

AND

nat (<interface>) 0.0.0.0 0.0.0.0 dns

Both seem to work.

What is the difference between using these two ?

1 REPLY
New Member

Re: Understanding the "dns" argument in PIX's "NAT" cmd

Hi,

I think the solution is something like this:

The "nat" command with that dns argument appears in PIX OS 6.2 first. Using that you do not have to use the "alias" any more.

In your config - if we regard that correct - there are three choices:

1) In your config there is no NAT configured, so why should you get any difference? nat (inside) 0 0 0 dns

2)Your situation is simple: all the servers you want to see has the same physical IP address as in the DNS replies (they have public IP). So you get the right IP.

3) I'm wrong... :-)

SA

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