RE: [FW1] FW-1 One External Interface- NAT to several public addresses

[Velasquez Venegas Jaime Omar]

Hi

I was re-reading this response as i am experiencing problems with my fw-1 on
this point: i.e. firewall-1 has to nat to external interfaces which are not
in the same network address it belongs ot.

fw1:external_interface: 200.10.50.1
And has to NAT-Hide to: 200.40.20.1 and 200.40.21.1
So far:
I-ve assigned these addresses to router:
200.10.50.2
200.40.20.2
200.40.21.2

On fw-1 , i ve set a local.arp
200.10.50.1
200.40.20.1
200.40.21.1

Is there anything else I should do? Like adding manually these ip addresses
as aliases to external interface or local.arp is enough?
This configuration seems to work for intervals and suddenly , fw-1 "loses"
its NAT rules on some hosts.

Am i missing something?

Thanks

Jaime O.


-----Original Message-----
From: Lars Troen [mailto:[EMAIL PROTECTED]]
Sent: Jueves, 08 de Marzo de 2001 07:48 a.m.
To: Velasquez Venegas Jaime Omar
Subject: RE: [FW1] FW-1 One External Interface- NAT to several public
addresses



1. Set static routes to the alternative external ip addresses on you router,
pointing to the firewalls external ip.
-or-
2. Set a static arp entry for the two other external ip addresses on the
firewall.

Lars

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
Velasquez Venegas Jaime Omar
Sent: Thursday, March 08, 2001 1:09 PM
To: 'FW1-MailingList (E-mail)'
Subject: [FW1] FW-1 One External Interface- NAT to several public
addresses



My trusted network is defined by a few internal networks.FW-1 should do NAT
every internal network to a different external public address:

192.168.1.0 -> Public_Network_1
192.168.2.0 -> Public_Network_2
192.168.3.0 -> Public_Network_3

Since the box running fw-1 has only one external interface , how should i
overcome this problem?


Thanks









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