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Network Security Firewalls
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Re: Network failure detection on linux boxes

Subject: Re: Network failure detection on linux boxes
Date: Tue, 10 Jan 2006 23:29:48 -0800
On Tuesday 10 January 2006 08:50 pm, David M. Zendzian wrote:

It is not possible to perform any kind of dynamic routing with any of
those ISPs, is there any kind of daemon of script that could run on
the fw boxes so that I could ping or access some hosts or websites on
the Internet through the first ISP and in case they are not accessible
(any kind of network failure, not only link fail on the WAN side of
the ISP router but also some backbone link of ISP) then it could just
change the default route in the boxes to go through the second ISP.
NAT would be outbound-performed on interfaces to each ISP router.

You can try shorewall , check this article:

Shorewall and Multiple Internet Connections

http://shorewall.net/MultiISP.html

Regards.

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