problems with pf

[Luke Dean]

> I have read the manpage on pf but I am still stumped.  I get some error 
> messages when starting up that say something like 'rule expands to no 
> possible valid combination' or something to that effect.  If someone can tell 
> me how I can find out what the error messages are when I boot I will post 
> them.

Parse your rules without actually loading them:
pfctl -n -f /etc/pf.conf

Flush the old rules and load the new ones without rebooting:
pfctl -F -f /etc/pf.conf

Both are must-haves for tinkering with pf.