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

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 for Android: free password hash cracker in your pocket

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

Message-ID: <474C9D6A.4000505@cfl.rr.com>
Date:	Tue, 27 Nov 2007 17:42:50 -0500
From:	Phillip Susi <psusi@....rr.com>
To:	Mikael Ståldal <mikael.staldal@...vits.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Possibility to adjust the only-root-can-bind-to-port-under-1024
 limit

Mikael Ståldal wrote:
> And how do you protect ports >1024 from any user binding to them?
> 
> Isn't the 1024 limit somewhat obsolete and arbitrary today?

No, it is not obsolete, yes, it always was arbitrary.

You prevent users from binding to those ports by only giving 
applications that need to the capability, and only letting the users 
that need to have execute permission to those programs.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/