Bridging again

[Gergo Szakal]

Emiel Kollof wrote:
I would definately allow ICMP, because ICMP is just necessary. If you don't 
want ping to work, just disallow icmp echo and reply.
Again: that config works on OpenBSD 3.8, just we cannot ping, but other 
ICMP works. This is from the PF users' guide:

'Another advantage of keeping state is that corresponding ICMP traffic 
will be passed through the firewall. For example, if keep state is 
specified for a TCP connection and an ICMP source-quench message 
referring to this TCP connection arrives, it will be matched to the 
appropriate state entry and passed through the firewall.'

http://www.openbsd.org/faq/pf/filter.html