From: Filipe Abrantes <fla@inescporto.pt>
To: netfilter@lists.netfilter.org
Subject: Re: UDP nat question
Date: Wed, 20 Apr 2005 17:11:49 +0100 [thread overview]
Message-ID: <42667F45.5000502@inescporto.pt> (raw)
First of all, thanks for replying, it's clear now.
I have one more question related to this:
Imagine a host behind NAT with IP 192.168.22.33 which has an application
on port 5060 ( a sip client) and opens a connection to a server outside
the NAT (the sip registrar with IP 130.11.22.33 on port 5060), and
consider that the NAT box translates the SIP client src_ip to
129.11.22.33 and src_prt to 5054, for this communication.
The SIP registrar is able to reach the SIP client running on
192.168.22.33:5060 by using 129.11.22.33:5054, but what about other
hosts on the Internet? Will they also be able to reach the SIP client
using the pair 129.11.22.33:5054, or only packets coming from the SIP
registrar be accepted?
Thanks again
Filipe Abrantes
--
Filipe Lameiro Abrantes
INESC Porto
Campus da FEUP
Rua Dr. Roberto Frias, 378
4200-465 Porto
Portugal
Phone: +351 22 209 4266
E-mail: fla@inescporto.pt
next reply other threads:[~2005-04-20 16:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-20 16:11 Filipe Abrantes [this message]
2005-04-21 12:17 ` UDP nat question Damjan
2005-04-21 18:02 ` Taylor, Grant
-- strict thread matches above, loose matches on Subject: below --
2005-04-18 14:26 Filipe Abrantes
2005-04-19 12:03 ` Jason Opperisano
2005-04-19 13:31 ` Daniel Lopes
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