Date: Sun, 31 Aug 1997 13:13:30 +0200 (SAT) From: Russell Vincent <rv@groa.uct.ac.za> To: freebsd-questions@freebsd.org Subject: Problem with packet alias/natd Message-ID: <E0x57wg-00064Q-00@groa.uct.ac.za>
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I am seeing an anomoly when using natd to do address translation.
On a host (137.158.128.10):
# ipfw a 88 divert 8888 tcp from 137.158.128.1 to 137.158.128.10 23
00089 divert 8888 tcp from 137.158.128.1 to 137.158.128.10 23
# natd -v -p 8888 -a 137.158.128.10 redirect_address 137.158.128.7 0.0.0.0
I read that as anything received from host 137.158.128.1 to
137.158.128.10:23 is diverted to natd, which translates the source
address to 137.158.128.10 (the aliasing machine) and destination
address to 137.158.128.7.
The natd output after a telnet from 137.158.128.1 to 137.158.128.10:
In [TCP] 137.158.128.1:1096 -> 137.158.128.10:23 aliased to
137.158.128.1:1096 -> 137.158.128.10:23
[ Repeated until I stop natd ]
Try a different tactic by picking up the alias address from the
interface (de):
# natd -v -p 8888 -n de0 -redirect_address 137.158.128.7 0.0.0.0
In [TCP] 137.158.128.1:1100 -> 137.158.128.10:23 aliased to
137.158.128.1:1100 -> 137.158.128.7:23
Hmmm ... the interface address for de0 is the same as the '-a' address
above (137.158.128.10).
i.e: Neither of the above works, but I get different results.
Am I doing something wrong or perhaps expecting too much
from natd?
Thanks
-Russell
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