FreeBSD - Secure by DEFAULT ?? [hosts.allow]

[Chris Odell]

But why IPFW? IPF is *BSD native wall. I actually use both - IPF for
firewalling, and IPFW for throttling via dummy net. My recommended
reading for IPF and IPFW is "Building Linux and OpenBSD Firewalls" and
Google for "IPF, host based, web server" If you will like I can send a
few examples to show this, as its will be very simple after seeing real
world rules. 

  I would be more then happy to help anyone thought this process, and
may even write a paper on it. There are plenty of sites that show how to
build a nat/ipf router but not really much on localhost based IPF.

Chris Odell

-----Original Message-----
From: twig les [mailto:twigles at yahoo.com] 
Sent: Thursday, August 07, 2003 12:19 PM
To: chris at redstarnetworks.net; freebsd-security at freebsd.org
Subject: RE: FreeBSD - Secure by DEFAULT ?? [hosts.allow]


Yes I've had great luck with simple host protection via IPFW, and there
is a nice tutorial here:
http://www.onlamp.com/pub/a/bsd/2001/04/25/FreeBSD_Basics.html. 
It's a bit old but I'm using IPFW on several 4.x boxes without any big
changes.  Sorry I don't have a more definitive answer.

--- Chris Odell <chris at redstarnetworks.net> wrote:
> 
>   May I recommend IPF, FreeBSD's firewall daemon? Having this in place

> - and yes on localhost, will be more of what you want to
> accomplish. You
> will also be able to control a whole lot more as far as
> traffice to/from
> your box. It is very simple to configure, as long as you can
> recompile
> it in your kernel.
> 
> Just my 2 cents...
> 
> Chris Odell
> chris at redstarnetworks.net
> 
> -----Original Message-----
> From: owner-freebsd-security at freebsd.org
> [mailto:owner-freebsd-security at freebsd.org] On Behalf Of Schalk 
> Erasmus
> Sent: Thursday, August 07, 2003 10:14 AM
> To: freebsd-security at freebsd.org
> Subject: FreeBSD - Secure by DEFAULT ?? [hosts.allow]
> 
> 
> Hi,
> 
> I need to know what the implications are to make use of the 
> hosts.allow file on a FreeBSD Production Server (ISP Setup)? The 
> reason I'm asking,
> is that I've recently decommisioned a Linux SendMail Server to
> a FreeBSD
> Exim Server, but with no Firewall (IPTABLES) yet.
> 
> Besides the fact that it only runs EXIM and Apache, is it necessary to
> Configure rc.Firewall? or can I only make use of the
> hosts.allow file?
> 
> Currently I would only like to allow SSH access from my Home Network,
> instead of allowing the WORLD.
> 
> I've seen OpenBSD Servers using hosts.deny and hosts.allow files, but
> based on the new "Access Control File", it is all merged
> together in one
> file:
> 
> # hosts.allow access control file for "tcp wrapped" applications. #
> $FreeBSD: src/etc/hosts.allow,v 1.8.2.7 2002/04/17 19:44:22
> dougb Exp $
> #
> 
> I take that I should allow the other Services, in this order:
> 
> sshd : myhomepc : allow
> exim : ALL : allow
> httpd : ALL : allow
> ftpd : ALL : allow
> ALL : ALL : deny
> 
> 
> What kind of protection does FreeBSD need by Default? Since OpenBSD 
> goes around saying: "SECURE BY DEFAULT" !?
> 
> Just asking.....
> 
> Regards
> 
> Schalk Erasmus
> Incredible Networks
> Windhoek, Namibia
> 
> 
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