Shorewall users - Mar 2005 - Multiple Internet Connection Issue

Up here in British Columbia, Canada the major ISPs (telco and cable
company) have started to enforce caps on bandwidth consumption per
month.  Other smaller ISPs have sprung out of the woodwork and offer
''unlimited'' consumption but the problem is that the quality of
their
connection is noticeably inferior to that of the major ISPs.

In what way could I configure Linux (I''m running FC3) so that it would:

1. utilize both connections to get maximum speed (until the cap is
reached on the 1 interface)

2. When one connection goes down, use the other (regardless of cap
situation with other ISP).  If this isn''t possible, no big deal, but it
would be nice.

3. Implement traffic shaping so I can prioritize certain ports & PCs.
(I already have this setup, but I want to make sure that a solution that
allows for load balancing doesn''t interfere).

I have read through the Linux Advanced Routing & Traffic Control HOWTO
and seen the section on Load Balancing, but it does not cover shutting
down one interface once a cap is reached.

Thanks,

--- Aaron

1) use policy routing (or experimental ROUTE module for iptables - in
pom-ng, see www.netfilter.org) to split the traffic accordingly

2) write a script that tests your connection periodicaly and sets the
default route

3) use IMQ (www.linuximq.net) - this way, you become independent on the
physical interfaces (but maybe that''s not appropriate if the two lines
have different link parameters)

Aaron O''Hara wrote:
>Up here in British Columbia, Canada the major ISPs (telco and cable
>company) have started to enforce caps on bandwidth consumption per
>month.  Other smaller ISPs have sprung out of the woodwork and offer
>''unlimited'' consumption but the problem is that the
quality of their
>connection is noticeably inferior to that of the major ISPs.
>
>In what way could I configure Linux (I''m running FC3) so that it
would:
>
>1. utilize both connections to get maximum speed (until the cap is
>reached on the 1 interface)
>
>2. When one connection goes down, use the other (regardless of cap
>situation with other ISP).  If this isn''t possible, no big deal,
but it
>would be nice.
>
>3. Implement traffic shaping so I can prioritize certain ports & PCs.
>(I already have this setup, but I want to make sure that a solution that
>allows for load balancing doesn''t interfere).
>
>I have read through the Linux Advanced Routing & Traffic Control HOWTO
>and seen the section on Load Balancing, but it does not cover shutting
>down one interface once a cap is reached.
>
>Thanks,
>
>--- Aaron
>
>
>
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