About named port binding

From: chulmin (chulmin@etc.co.kr)
Date: 01/03/02 

From: "chulmin" <chulmin@etc.co.kr>
To: <focus-linux@lists.securityfocus.com>
Date: Thu, 3 Jan 2002 20:55:31 +0900

Hello, all.

I know that only root account bind a port below 1024.
and anyuser except root can bind or use a port above 1024.
But named process uses udp port 53 with named uid.
How can it be possible?
and is it illegal or exception?

Thanks in advance.

Relevant Pages

  • Re: About named port binding
    ... >> I know that only root account bind a port below 1024. ... >> and anyuser except root can bind or use a port above 1024. ... > Heh, it isn't that simple, with POSIX 1.e capabilities. ...
    (Focus-Linux)
  • Re: About named port binding
    ... > I know that only root account bind a port below 1024. ... > and anyuser except root can bind or use a port above 1024. ... process EUID. ...
    (Focus-Linux)