142a227f8SMax Laier# $OpenBSD: faq-example1,v 1.5 2006/10/07 04:48:01 mcbride Exp $ 29d7ccc0fSMax Laier 39d7ccc0fSMax Laier# 49d7ccc0fSMax Laier# Firewall for Home or Small Office 59d7ccc0fSMax Laier# http://www.openbsd.org/faq/pf/example1.html 69d7ccc0fSMax Laier# 79d7ccc0fSMax Laier 89d7ccc0fSMax Laier 99d7ccc0fSMax Laier# macros 1042a227f8SMax Laierext_if="fxp0" 1142a227f8SMax Laierint_if="xl0" 129d7ccc0fSMax Laier 139d7ccc0fSMax Laiertcp_services="{ 22, 113 }" 149d7ccc0fSMax Laiericmp_types="echoreq" 159d7ccc0fSMax Laier 1642a227f8SMax Laiercomp3="192.168.0.3" 179d7ccc0fSMax Laier 189d7ccc0fSMax Laier# options 199d7ccc0fSMax Laierset block-policy return 209d7ccc0fSMax Laierset loginterface $ext_if 219d7ccc0fSMax Laier 2242a227f8SMax Laierset skip on lo 2342a227f8SMax Laier 249d7ccc0fSMax Laier# scrub 2542a227f8SMax Laierscrub in 269d7ccc0fSMax Laier 279d7ccc0fSMax Laier# nat/rdr 28*4ba82b17SRui Paulonat on $ext_if inet from !($ext_if) -> ($ext_if:0) 2942a227f8SMax Laiernat-anchor "ftp-proxy/*" 3042a227f8SMax Laierrdr-anchor "ftp-proxy/*" 3142a227f8SMax Laier 3242a227f8SMax Laierrdr pass on $int_if proto tcp to port ftp -> 127.0.0.1 port 8021 3342a227f8SMax Laierrdr on $ext_if proto tcp from any to any port 80 -> $comp3 349d7ccc0fSMax Laier 359d7ccc0fSMax Laier# filter rules 3642a227f8SMax Laierblock in 379d7ccc0fSMax Laier 3842a227f8SMax Laierpass out 399d7ccc0fSMax Laier 4042a227f8SMax Laieranchor "ftp-proxy/*" 4142a227f8SMax Laierantispoof quick for { lo $int_if } 429d7ccc0fSMax Laier 4342a227f8SMax Laierpass in on $ext_if inet proto tcp from any to ($ext_if) port $tcp_services 449d7ccc0fSMax Laier 4542a227f8SMax Laierpass in on $ext_if inet proto tcp from any to $comp3 port 80 \ 4642a227f8SMax Laier synproxy state 479d7ccc0fSMax Laier 4842a227f8SMax Laierpass in inet proto icmp all icmp-type $icmp_types 499d7ccc0fSMax Laier 5042a227f8SMax Laierpass quick on $int_if no state 51