On 8 Mar 00, at 16:44, Charles Boening <[EMAIL PROTECTED]> wrote:
> Could set a cron job that checks to see which interface has access and
> adjust accordingly.
>
> Charlie
>
Charlie:
Thanks for the reply; cron job sounds like it would work here, albeit
a bit of a kludge.
Any other ideas?
>
>
> -----Original Message-----
> From: Jerry Keene [mailto:[EMAIL PROTECTED]]
> Subject: IP Masquerading for Failsafe Internet Service?
>
> We recently added another ISP, so our system has two potential
> routes to the internet. I've set up Routed and have configured
> /etc/gateways using
>
> net 0.0.0.0 gateway xx.xx.xx.1 metric 1 passive
> net 0.0.0.0 gateway xx.xx.xx.1 metric 2 passive
>
> During testing both default routes to the internet work properly from
> the server; that is, if I pull the plug on one ISP pipe, I can reach
> the internet through the other and vice versa.
>
> However IP masquerading using ipchains doesn't work if the default
> gateway for masquerading goes down. When that gateway is taken down
> the internet is no longer reachable from workstations.
>
> I've configured /etc/rc.d/rc.ipchains is configured using
>
> ipchains -b -A forward -j MASQ -p all -s 10.0.0.0/8 -d 0.0.0.0/0
> ipchains -A forward -j ACCEPT -p all -s xx.xx.xx.64/27 -d 0.0.0.0/0
>
> which works until plug is pulled on one of our two default internet
> gateways.
>
> Is there an automated way to have ip masquerading change to a
> new default internet gateway if one goes down?
>
Jerry R. Keene
Senior Systems Analyst
SCS ENGINEERS
Partners With EPA Through The Landfill Methane Outreach Program
Phone: 703.471.6150
Fax: 703.471.6676
http://www.scsengineers.com
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