Following this discussion at LQ, I would like to take a note of a few more options for a
– AlienBob’s easy firewall generator
– The example firewall script already present in
/etc/ppp/firewall-standalone. Changing the
EXTIF variable may be necessary.
– The email sent to root by Pat, which is in
/var/spool/mail/root contains an example.
– a yet another example from the same thread