From owner-freebsd-questions  Wed May 28 23:08:44 1997
Return-Path: <owner-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.5/8.8.5) id XAA27393
          for questions-outgoing; Wed, 28 May 1997 23:08:44 -0700 (PDT)
Received: from gatekeeper.barcode.co.il (gatekeeper.barcode.co.il [192.116.93.17])
          by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id XAA27385
          for <freebsd-questions@FreeBSD.ORG>; Wed, 28 May 1997 23:08:39 -0700 (PDT)
Received: (from smap@localhost) by gatekeeper.barcode.co.il (8.8.5/8.6.12) id JAA18422; Thu, 29 May 1997 09:07:29 +0300 (IDT)
X-Authentication-Warning: gatekeeper.barcode.co.il: smap set sender to <nadav@barcode.co.il> using -f
Received: from localhost.barcode.co.il(127.0.0.1) by gatekeeper.barcode.co.il via smap (V1.3)
	id sma018420; Thu May 29 09:07:01 1997
Message-ID: <338D1CEF.D0F@barcode.co.il>
Date: Thu, 29 May 1997 09:06:39 +0300
From: Nadav Eiron <nadav@barcode.co.il>
X-Mailer: Mozilla 3.0 (X11; I; SunOS 5.5 sun4m)
MIME-Version: 1.0
To: NetSonic <sales@netsonic.net>
CC: freebsd-questions@FreeBSD.ORG
Subject: Re: domain/ip blocking
References: <3.0.32.19970528160514.006bc900@mail.netsonic.net>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

NetSonic wrote:
> 
> Ok, i think you guys discussed this earlier, but I missed it.. Is there a
> way to block individual Ip's, a whole class c block of ip's or a domain
> name(s) from doing anything on your server whether it be send mail to it,
> look at web pages etc and if so, how?
> 
> Thanks
> 
> Adam

man ipfw

Also take a close look at the section on firewalls in the Handbook. Be
careful (and be at the console) when you play with it because you have
an excellent chance of locking yourself (and all other network traffic)
out.

Nadav