| # |
| # test ruleset |
| # |
| # allow packets coming from foo to bar through. |
| # |
| pass in from 10.1.1.2 to 10.2.1.1 |
| # |
| # allow any TCP packets from the same subnet as foo is on through to host |
| # 10.1.1.2 if they are destined for port 6667. |
| # |
| pass in proto tcp from 10.2.2.2/24 to 10.1.1.2/32 port = 6667 |
| # |
| # allow in UDP packets which are NOT from port 53 and are destined for |
| # localhost |
| # |
| pass in proto udp from 10.2.2.2 port != 53 to localhost |
| # |
| # block all ICMP unreachables. |
| # |
| block in proto icmp from any to any icmp-type unreach |
| # |
| # allow packets through which have a non-standard IP header length (ie there |
| # are IP options such as source-routing present). |
| # |
| pass in from any to any with ipopts |