I''ve built a custom system based on Debian Sarge and shorewall 2.0.8
functioning as gateway for my local network. Everything is working
perfectly, but my primary Internet uplink (Cable Broadband) is a bit
flakey lately, which is why I''d like to add my ISDN card for failover
dial-backup, should my primary link go down.
Maybe someone could outline the caveats of such a setup or point me to
some other documentation (I''ve already consumed the Debian Networking
guide, the I4L-FAQ as well as the excellent Shorewall documentation).
I gather I''ll have to do a bit of fancy footwork with the
"ip" command
and put a set of proper rules to /etc/shorewall/init or something, but
I''m not sure where everything would be put best.
I''m grateful for any hints whatsoever.
Best regards,
Albert.
