 | | | Transparent use of redundant ISPs in Linux? | Transparent use of redundant ISPs in Linux? 2002-08-28 - By Steve Snyder
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I am seeking information on the transparent use of 2 ISPs in Linux. My
goal is to have the second (slower) ISP 's connection be used if/when
there is an interruption in the service of the first (faster) ISP.
I 've done extensive Google 'ing on this topic, but most of the links found
are pretty old. I 'm writing to ask about the current abilites to meet
the above goal.
Basically, I 'm looking for a software version of the Nexland Pro800Turbo
(
http://www.nexland.com/products/product.cfm?id=4
), a device that is
supposed to do automatic fallover between 2 different ISP connections.
Why not just get the Pro800Turbo and be done with it? Because it is both
more and less than what I need. I don 't need 8 LAN ports, just one; I
don 't need the firewalling features because I prefer iptables. Most of
all I don 't need the instability (reported as the occasional lock-up of
the device) because my goal is *increased* stability in our Internet
connectivity. The complaints on this device got so numerous that Nexland
closed their user forum.
I 've got a Linux (Red Hat v7.3) machine that is currently acting as the
Internet gateway (single ISP) for our LAN. It works great with no
intervention beyond updates of software for security reasons. Now I want
to add a second ISP to the mix. In a perfect world I would use both
connections simultaneously to avoid paying for unused capacity, but
automatic fallover will do.
So... what is the current state of redundant Internet providers in Linux?
Thanks.
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