Re: [cobalt-users] Dual Internet Access (Balancing) using Qwest

[nobody <bs@xxxxxxxxxxx>]

On Sat, 30 Dec 2000, Bill Gunning so wrote:

} the main IP address of the server! So is their a way
} to change the Server's IP address to Qwest and leave
} the other IP's on the box using my DSL providers IPs,
} even though both providers are using different sub-net
} masks?

Hi Bill,

	Assuming Qwest isn't filtering, and they are probably not,
you won't have any problems using the DSL IPs on the T1 for outbound
traffic - virtual hosts, for example.

} So, then server would receive traffic from my DSL
} provider and send the traffic out using the Qwest
} 1M connection?

	This would require Qwest to setup, at a minimum, a
static route for you which would allow the DSL IPs traffic to come
in via their network. While Qwest might be willing to do that
they'll certainly want permission form your DSL provider before
they'll do so and they may or may not be willing to cooportate.

	It is possible to do this without the cooporation of either
upstream - we do it here - but doing it is not at all trivial.
There's a mini howto associated with the Linux Router Project that
will get you started (search for LRP on your favorite search engine
and look for the Load Balancing mini howto) but to really make
things work requires learning the nuances of routing in great depth.

	My suggestion would be run everything off the T1. 5 IP
addresses will support a minimum of primary and secondary DNS plus
3 servers running named based hosts. Assuming your office is
networked, you could use NAT for everything else and thereby support
a rather substantial network on those 5 IP addresses.