I'm running MacBSD on an SE/30 with an ethernet card and a modem, and would
like to set it up as a router. I want to use the modem to connect to my
ISP, and then route to a TCP/IP network on the ethernet in my house. What
do I need to make the SLIP connection via the modem? I tried playing with
cu, but can't seem to get it to work (it claims the tty00 (or tty01, I
forget) is already in use).

I'm a novice to MacBSD (and unix in general), so I'm not sure if I'm able
to compile source files if that's what is necessary (though I'd certainly
welcome the learning oppurtunity if someone can give me directions).

Thanks,

Chris