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List:       freebsd-bugs
Subject:    bin/81611: natd runs with -same_ports by default
From:       Alexander Melkov <melkov () comptek ! ru>
Date:       2005-05-29 1:51:46
Message-ID: 200505290151.j4T1pk4v092676 () www ! freebsd ! org
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> Number:         81611
> Category:       bin
> Synopsis:       natd runs with -same_ports by default
> Confidential:   no
> Severity:       non-critical
> Priority:       low
> Responsible:    freebsd-bugs
> State:          open
> Quarter:        
> Keywords:       
> Date-Required:
> Class:          sw-bug
> Submitter-Id:   current-users
> Arrival-Date:   Sun May 29 02:00:09 GMT 2005
> Closed-Date:
> Last-Modified:
> Originator:     Alexander Melkov
> Release:        5.4-STABLE
> Organization:
> Environment:
FreeBSD melkov.ru 5.4-STABLE FreeBSD 5.4-STABLE #4: Sun May 29 03:46:03 MSD 2005     \
spamtrap@melkov.ru:/usr/obj/usr/src/sys/MELKOV  i386
> Description:
even without -same_ports | -m switch natd tries to allocate the same
source port as in the original packet.

PKT_ALIAS_SAME_PORTS flag is set up in LibAliasInit function, -m switch
can also only set this flag.

Probably this default behaviour is actually good, and that's the manpage
should be shanged, not libalias :).

> How-To-Repeat:
run natd without -m and inspect incoming and outgoing packet ports with tcpdump.

> Fix:
Workaround: create and use a config have with
same_ports no

> Release-Note:
> Audit-Trail:
> Unformatted:
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