netdev - Re: Max nr of tcp connections?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Sun, 21 Feb 2010 21:44:14 +0100
From:	Damian Lukowski <damian@....rwth-aachen.de>
To:	David Balažic <xerces9@...il.com>,
	netdev@...r.kernel.org
Subject: Re: Max nr of tcp connections?

Am 21.02.2010, 19:18 Uhr, schrieb David Balažic <xerces9@...il.com>:

> Hi!
>
> In theory, a tcp connection is identified by the tuple (src-addres,
> src-port, dest-address, dest-port) so a lot of connections could exist
> on on host.
> But in practice I observed, that each outgoing connection is assigned
> a new, unique local (src) port is assigned. If I try to create a new
> connection
> to a new host using a "used" local port, I get an error. (tested with
> socat on kernel 2.4.30).

I don't know for 2.4.30, but there are no problems with a 2.6.26 kernel.

> tcp        0      0 137.226.116.3:1234      216.239.59.104:80        
> ESTABLISHED
> tcp        0      0 137.226.116.3:1234      74.125.39.103:80         
> ESTABLISHED

Damian
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html