Dear All,
I would like to know if it is possible to NAT only the
payload of DNS queries.
For example on Cisco I know it is possible to NAT the
payload and the IP header will be NATed at the same
time,
like explained in :
http://www.cisco.com/warp/public/556/3.html
IN FW1, I know how to use NAT for the IP hearder only
...
However, what I would like to do is much basic, but I
could not find if it will work or not.
Basically, I have a UNIX 'hostA' inside making a DNS
query to resolve a name 'nameA'.
The internal DNS gets the information from an external
DNS and forward it back to the inside hostA.
However, the IP matching 'nameA' is an internet IP
that is not routed inside. Which means
that 'hostA' can not communicate with 'nameA' 's IP
address ...
What I would like to do, is not to change the routing,
and not to translate any addresses in headers because
it is working fine like this, I just need to translate
the payload of the DNS reply from the DNS server in
FW1 (ie changing
from nameA<->IPexternal to
nameA<->IPtranslated2internal).
Please let me know if you know an answer, or have some
URL explaining the process.
Thank you for your help,
=====
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