Return to faq-example1 CVS log

Up to [local] / src / share / pf

Annotation of src/share/pf/faq-example1, Revision 1.3

1.3     ! joel        1: # $OpenBSD: faq-example1,v 1.2 2003/08/06 16:04:45 henning Exp $
1.1       henning     2:
                      3: #
                      4: # Firewall for Home or Small Office
1.2       henning     5: # http://www.openbsd.org/faq/pf/example1.html
1.1       henning     6: #
                      7:
                      8:
                      9: # macros
                     10: int_if = "fxp0"
                     11: ext_if = "ep0"
                     12:
                     13: tcp_services = "{ 22, 113 }"
                     14: icmp_types = "echoreq"
                     15:
                     16: priv_nets = "{ 127.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8 }"
1.3     ! joel       17:
        !            18: comp3 = "192.168.0.3"
        !            19:
1.1       henning    20: # options
                     21: set block-policy return
                     22: set loginterface $ext_if
                     23:
                     24: # scrub
                     25: scrub in all
                     26:
                     27: # nat/rdr
                     28: nat on $ext_if from $int_if:network to any -> ($ext_if)
                     29: rdr on $int_if proto tcp from any to any port 21 -> 127.0.0.1 \
                     30:    port 8021
1.3     ! joel       31: rdr on $ext_if proto tcp from any to any port 80 -> $comp3
1.1       henning    32:
                     33: # filter rules
                     34: block all
                     35:
                     36: pass quick on lo0 all
                     37:
                     38: block drop in  quick on $ext_if from $priv_nets to any
                     39: block drop out quick on $ext_if from any to $priv_nets
                     40:
                     41: pass in on $ext_if inet proto tcp from any to ($ext_if) \
                     42:    port $tcp_services flags S/SA keep state
1.3     ! joel       43:
        !            44: pass in on $ext_if proto tcp from any to $comp3 port 80 \
        !            45:    flags S/SA synproxy state
        !            46:
        !            47: pass in on $ext_if inet proto tcp from port 20 to ($ext_if) \
        !            48:    user proxy flags S/SA keep state
1.1       henning    49:
                     50: pass in inet proto icmp all icmp-type $icmp_types keep state
                     51:
                     52: pass in  on $int_if from $int_if:network to any keep state
                     53: pass out on $int_if from any to $int_if:network keep state
                     54:
                     55: pass out on $ext_if proto tcp all modulate state flags S/SA
                     56: pass out on $ext_if proto { udp, icmp } all keep state