I have RoR installed and apparently working, since a simple
http://localhost:3000 displays on the server. But http://ip.address:3000
or http://ip.address:3000/hello doesn't work on other computers. The
computers are all behind the same firewall so it's not a firewall port
forward issue. Apache pages display correctly.
Are you getting an 'unable to connect' type of error?
Try netstat -n --tcp --listening on the server. Mongrel (or whatever)
should be listening on *:3000. If instead you see 127.0.0.1:3000,
then only local connections will get a response.