serial console

["Michael McCaffrey" <michael@fxprojects.com>]

i have a couple questions. if i can get one of them to work i'll be fine. 
both would be great.

1. i'd like to setup a serial console. i have "set tty com0" in my
/etc/boot.config. it works while the system is booting and the messages 
are printed via the serial console but as soon as the login prompt comes 
up it switches back to the keyboard and video. i must be missing something 
but can't figure out what it is.

2. i have a bridge/firewall and it works great but i'd like to assign an 
IP to the internal interface. do i use a real IP that's in my subnet and 
just block it from the internet with the firewall or use a non-routable IP 
such as 10.0.0.5?

thanks,
Michael McCaffrey