Very Computer

I've just set up a 2 PC Lan, one of which has a modem.  I can
successfully connect to my ISP using the PC with the modem.  I can use
the LAN, no problem (telnet/ping/mount etc).  I've configured the
non-modem PC to use the modem-PC as the default gateway.  However, I
can't see the 'net from the non-modem PC.

The ISP is using dynamic IP's, and I'm not using a firewall.  The
non-modem PC is running RH5 and the modem-PC is using RH4.

Q: In RH5, I know that ip forwarding has to be enabled (by putting "1"
into /proc/net/ipv4/ip_forward).  Does something similar have to happen
with RH4 ?

Also, given my setup, am I using the correct approach ?
Thanks in advance, Pete.

| I've just set up a 2 PC Lan, one of which has a modem.  I can
| successfully connect to my ISP using the PC with the modem.  I can use
| the LAN, no problem (telnet/ping/mount etc).  I've configured the
| non-modem PC to use the modem-PC as the default gateway.  However, I
| can't see the 'net from the non-modem PC.

The modem system needs to have ip-forwarding compiled in and enabled.
unless you have multiple IP addresses (unlikely) routed by your ISP, you
need to enable masquerade as well.

The non-modem system needs to have the modem system set as it's default
router.

If you want to be able to get to the non-modem machine from the outside
world, the rinetd program is a great solution. It allows what appears to
be a connection to the firewall be a connection to a machine elsewhere
(need not be behind the firewall!) to provide services.

Masquerade <> proxy, don't set the non-modem machine to proxy a browser
off the firewall (unless you really do run a proxy server there).
--

"In elementary school, in case of fire you have to line up quietly in a
single file line from smallest to tallest. What is the logic? Do tall
people burn slower?"
                --Warren Hutcherson