linux-kernel - Re: Possibility to adjust the only-root-can-bind-to-port-under-1024 limit

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Message-ID: <474A975A.8020302@univits.com>
Date:	Mon, 26 Nov 2007 10:52:26 +0100
From:	Mikael Ståldal <mikael.staldal@...vits.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: Possibility to adjust the only-root-can-bind-to-port-under-1024
   limit

Radoslaw Szkodzinski (AstralStorm) skrev:
>> In Linux you have to be root in order to listen to TCP or UDP ports below 1024 (the 
>> well-known ports). As far as I know, this limit is hardcoded in the kernel.
>
> The proper way to enable port <= 1024 binding support is adding CAP_NET_BIND_SERVICE to 
 > the process capability set, e.g. by using file-system capabilities.

And how do you protect ports >1024 from any user binding to them?

Isn't the 1024 limit somewhat obsolete and arbitrary today?

/Mikael

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