Re: setting access rights to priviledged ports

Anthony Barbachan (barbacha@Hinako.AMBusiness.com)
Wed, 14 Oct 1998 21:01:02 -0400

An alternative is to write a small socket redirecting program to redirect
traffic from one port to another. This is doable as I have done it myself
to not only work locally but also to a completely different machine. This
program could be installed on socket 25 and have it redirect requests to a
user process available port where you could install your suided sendmail
program.

-----Original Message-----
From: Adam Sulmicki <adam@cfar.umd.edu>
To: Stefan Monnier
<monnier+lists/linux/kernel/news/@TEQUILA.SYSTEMSZ.CS.YALE.EDU>
Cc: linux-kernel@vger.rutgers.edu <linux-kernel@vger.rutgers.edu>;
adam@cfar.umd.edu <adam@cfar.umd.edu>
Date: Wednesday, October 14, 1998 10:08 AM
Subject: Re: setting access rights to priviledged ports

>Stefan Monnier writes:
>->
>->I seem to remember people working on a "thingie" that would allow
>->the sysadm to say that port 25 can be opened by user 'mail' so that
>->sendmail can be made setuid-mail (and so on for news, dns, ...)
>->
>->Does such a thing exist ?
>
>The thing closest to it which is actually in linux kernel (2.1.x)
>is "Capabilties". But it is not a fine grained as you ask. It would let
>you give privilage to 'access ports'
>
>IIRC.
>The thing you talk about was 'chown port' patch, which used to
>map ports onto filesystem and use chown to change them at will.
>I did not made into kernel
>
>Adam
>
>-
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