Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: Wizard-level questions
Message-ID: <5653@auspex.auspex.com>
Date: 1 Feb 91 18:58:13 GMT
References: <16048@sdcc6.ucsd.edu> <1991Jan26.142403.22812@mp.cs.niu.edu> <120574@uunet.UU.NET>
Organization: Auspex Systems, Santa Clara
Lines: 8

>Besides getpeername, there is the concept of privileged ports in UNIX.
>They can be allocated only by root, and presumably root writes only
>trusted programs. Like sendmail, ftp, and finger :-)

In addition, that concept doesn't exist on other OSes, so if you have a
program that expects only privileged programs to be coming in from
privileged ports, may I attach a PC running DOS and some TCP/IP software
to your network? I'm sure it'd be lots of fun....