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Date:      Thu, 27 May 1999 21:28:30 +0300
From:      Ruslan Ermilov <ru@ucb.crimea.ua>
To:        Wayne Cuddy <wayne@crb-web.com>
Cc:        FreeBSD Questions <questions@freebsd.org>
Subject:   Re: nat and ip_alias
Message-ID:  <19990527212830.A64318@relay.ucb.crimea.ua>
In-Reply-To: <Pine.LNX.3.95.990527123518.780C-100000@crb.crb-web.com>; from Wayne Cuddy on Thu, May 27, 1999 at 12:41:48PM -0400
References:  <19990527185651.A30909@relay.ucb.crimea.ua> <Pine.LNX.3.95.990527123518.780C-100000@crb.crb-web.com>

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On Thu, May 27, 1999 at 12:41:48PM -0400, Wayne Cuddy wrote:
> I have an ADSL modem connected to a 10BaseT hub and several boxes also connect
> to the hub one of which is a freebsd box with NATD installed.  I am not doing
> this for security reasons but simply for easy in use.  I have a caching DNS
> setup on the Freebsd box and want to point all other boxes to that as this
> default route and DNS.
> 
> So I need to bind 192.168.30.1 and 207.196.47.2 to the same card.  Obviously
> 207.196.47.2 will receive inbound/outbound packets to the internet.
> 
> Thanks for your help,
> Wayne
> 

Run natd with ``-u -a 207.196.47.2''.  This will instruct natd to:

1) use 207.196.47.2 as a translation address
2) only alter _outgoing_ packets with RFC1918 source addresses


Configure your firewall so, that it will
	allow ip from 192.168.30.1 to 192.168.30.0/24
	divert natd ip from any to any via <natd_interface>
in the specified order.

Without the `-u' flag of natd or without the first firewall rule,
the communication between this host (running natd) and other hosts
on the 192.168.30/24 network will be broken.

I'd like to hear your feedback, please.


Cheers,
-- 
Ruslan Ermilov		Sysadmin and DBA of the
ru@ucb.crimea.ua	United Commercial Bank
+380.652.247.647	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age


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