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Network Security Firewalls
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Re: firewall with two wan interface

Subject: Re: firewall with two wan interface
Date: Mon, 20 Mar 2006 19:08:07 +0100
El dom, 19-03-2006 a las 22:12 -0800, Tran Tan escribiÃ:

Hi everybody

I have two ISP , one for ADSL and one for Leased line.
I want to use one
firewall for two wan. Anyone tell me whether I can use
two interface in
firewall for two wan or not. (Firewall can be choice
from netscreen,pix,
checkpoint...). If I use that scenario whether I can
use features such as
load balancing, redundancy..

Thank you very much



Of course

For example, with iptables ( fwbuilder as GUI ) for firewalling and ip
route with multipath 

The interesting thing:

" ip route add default scope global nexthop via ISP1 dev eth2isp1 weight
4 netxhop via ISP2 dev eth2isp2 weight 1"

In this example ISP1 is 4 Mb DSL and ISP2 is only 1 Mb ( weight
'balance' ) if one of links goes down, it is not used but tested until
gets up again ( some type of  failover )

HTH
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