Hi. I'm setting up an IP masquerading/IP forwarding server with RedHat 6.1
(updated) for internet access to an office of 10 workstations. The
internet connection comes through eth0 on a full-time "wireless" (like a
cable modem) connection. However, it's not 100% reliable, as the
connection through it will drop periodically when the ISP's wireless
equipment blows up. So, we've hooked up an external 56K modem to ttyS1 so
that we can use it when the wireless connection drops.
I had thought that this could be done by simply adding a ppp0 to netcfg and
have it enable ppp0 on startup. We'd leave the modem turned off until we
needed it, and then we'd turn it on, and the connection would come up.
This works... except that when ppp0 becomes connected it permanently kills
the internet connectivity through eth0, which won't return until the DNS
numbers are reset, ppp0 removed, and eth0 restarted.
It would be nice if I could have two simultaneous connections and have
traffic come through either one as the bandwidth demands, but as it stands
it looks like this will only work with one connection. Does anyone know
how to get two simultaneous MASQ/IPFWD internet connections working? Has
someone configured diald to connect a ppp connection when the LAN
connection drops (and then down the connection when the LAN returns)?
Basically I'm needing to configure a redundant internet connection.
Thanks.
Lee Howard
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