[Bug 92] New: ICMP type 3 code 4 message generation - incorrect address generation on some NATed connections
Wed, 21 May 2003 16:55:58 +0200
Summary: ICMP type 3 code 4 message generation - incorrect
address generation on some NATed connections
OS/Version: RedHat Linux
On an SNAT (and maybe DNAT as well) connection, any path mtu discovery messages
(icmp type=3 code=4) generated from traffic going from the destination back to
the source need to set the DST address in the payload of the pmtud message to
the translated address instead of the orginal address.
The recipient of the pmtud message needs to see the translated address instead
of the pre-translated original address to be able to associate the pmtud message
with the connection.
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