I was getting a bogus IP from my ISP the other day and my FreeBSD firewall was having a tough time getting connectivity. I found this page:
which says this:
In this case the active interface is sis0, so here is the command to run.
# /sbin/dhclient -r sis0
Now occasionally that may not work as quickly as you might like. If you want to force it, you can restart the networking components by hand.
Saved my bacon!
© 2005 Scott Wiersdorf