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Annotation of src/etc/pf.conf, Revision 1.6

1.6     ! fgsch       1: #      $OpenBSD: pf.conf,v 1.5 2002/06/22 10:19:13 henning Exp $
1.1       kjell       2: #
1.2       smart       3: # See pf.conf(5) for syntax and examples
1.4       henning     4: #
                      5: # replace ext0 with external interface name, 10.0.0.0/8 with internal network
                      6: # and 192.168.1.1 with external address
1.5       henning     7:
1.6     ! fgsch       8: # Normalize: reassemble fragments and resolve or reduce traffic ambiguities
1.5       henning     9:
                     10: # scrub in all
                     11:
1.4       henning    12: # nat: packets going out through ext0 with source address 10.0.0.0/8 will get
                     13: # translated as coming from 192.168.1.1. a state is created for such packets,
                     14: # and incoming packets will be redirected to the internal address.
                     15:
                     16: # nat on ext0 from 10.0.0.0/8 to any -> 192.168.1.1
                     17:
                     18: # rdr: packets coming in through ext0 with destination 192.168.1.1:1234 will
                     19: # be redirected to 10.1.1.1:5678. a state is created for such packets, and
                     20: # outgoing packets will be translated as coming from the external address.
1.1       kjell      21:
1.4       henning    22: # rdr on ext0 proto tcp from any to 192.168.1.1/32 port 1234 -> 10.1.1.1 port 5678
                     23:
                     24: # filter rules
                     25: # the implicit first two rules are
1.1       kjell      26: # pass in all
                     27: # pass out all
1.4       henning    28:
                     29: # block all incoming packets but allow ssh, pass all outgoing tcp and udp
                     30: # connections and keep state
1.6     ! fgsch      31: # log blocked packets
1.4       henning    32:
                     33: # block in log all
                     34: # pass  in  on ext0 proto tcp from any to ext0 port 22 keep state
                     35: # pass  out on ext0 proto { tcp, udp } all keep state