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

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Message-ID: <20071120155303.76f234ec@astralstorm.puszkin.org>
Date:	Tue, 20 Nov 2007 15:53:03 +0100
From:	Radoslaw Szkodzinski (AstralStorm) <lkml@...ralstorm.puszkin.org>
To:	Mikael Ståldal 
	<mikael.staldal-ingen-reklam@...vits.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Possibility to adjust the only-root-can-bind-to-port-under-1024
 limit

On Tue, 20 Nov 2007 11:14:59 +0100
Mikael Ståldal  <mikael.staldal-ingen-reklam@...vits.com> wrote:

> 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.
> 
> In some cases, this limit do more harm than good, so it would be nice to be able to adjust it.

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.

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