From: Antony Stone <Antony@Soft-Solutions.co.uk>
To: netfilter@lists.netfilter.org
Subject: Re: Could someone tell me the rules of port translation in SNAT ?
Date: Mon, 5 Jan 2004 11:14:24 +0000 [thread overview]
Message-ID: <200401051114.24879.Antony@Soft-Solutions.co.uk> (raw)
In-Reply-To: <BAY10-F80mi4Ho8YZ4n00031d23@hotmail.com>
On Monday 05 January 2004 6:22 am, ding dang wrote:
> When using SNAT of Netfilter as an NAPT, how will Netfilter assign the
> public UDP port for a UDP request from the private network to Internet?
With both TCP and UDP, netfilter will use the source port contained in the
original packet if it can (ie: if that source port is not being used for
something else by the netfilter machine). If this is not possible, then
another port is chosen at random using the standard socket-binding mechanism
used for any network connection.
> Could someone detail it to me when the UDP request is
> NEW/ESTABLISHED/RELATED/REPLIED/UNREPLIED?
This makes no difference.
Antony.
--
In science, one tries to tell people
in such a way as to be understood by everyone
something that no-one ever knew before.
In poetry, it is the exact opposite.
- Paul Dirac
Please reply to the list;
please don't CC me.
next prev parent reply other threads:[~2004-01-05 11:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-05 6:22 Could someone tell me the rules of port translation in SNAT ? ding dang
2004-01-05 11:14 ` Antony Stone [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-01-07 7:37 ding dang
2004-01-07 9:49 ding dang
2004-01-07 10:08 ` Antony Stone
2004-01-08 1:55 ding dang
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