1#--------------------------------------------------------------------------
2# ed1 - external interface
3# fxp0 - internal interface
4#--------------------------------------------------------------------------
5# First, nasty packets which we don't want near us at all
6# packets which are too short to be real except echo replies on lo0
7pass in log quick on lo0 proto icmp from 127.0.0.1/8 to 127.0.0.1/8 with short
8block in log quick all with short
9block in log quick all with opt lsrr
10block in log quick all with opt ssrr
11#--------------------------------------------------------------------------
12# loopback packets left unmolested
13pass in log quick on lo0 all
14pass out log quick on lo0 all
15#--------------------------------------------------------------------------
16# Group setup:
17# 100 incoming ed1
18# 150 outgoing ed1
19# 200 incoming fxp0
20# 250 outgoing fxp0
21#--------------------------------------------------------------------------
22block in log body on ed1 all head 100
23block out log body on ed1 all head 150
24#--------------------------------------------------------------------------
25block in log on fxp0 all head 200
26block out log on fxp0 all head 250
27#--------------------------------------------------------------------------
28# incoming ed1 traffic - group 100
29# 1) prevent localhost spoofing
30block in log quick from 127.0.0.1/32 to 192.168.0.0/24 group 100
31block in log quick from 127.0.0.1/32 to 192.168.1.0/24 group 100
32block in log quick from any to 127.0.0.1/8 group 100
33#--------------------------------------------------------------------------
34# 2) deny pakets which should not be seen on th internet (paranoid)
35block in log quick from 10.0.0.0/8 to any group 100
36block in log quick from any to 10.0.0.0/8 group 100
37block in log quick from 172.16.0.0/16 to any group 100
38block in log quick from any to 172.16.0.0/16 group 100
39block in log quick from 192.168.0.0/16 to any group 100
40block in log from any to 192.168.0.0/16 group 100
41# 3) implement policy
42# allow incoming ftp-data
43pass in log quick proto tcp/udp from any to 192.168.1.1/24 keep state group 100
44# if nothing applies, block and return icmp-replies (unreachable and rst)
45block return-icmp(net-unr) in proto udp from any to any group 100
46block return-rst in log proto tcp from any to any group 100
47#--------------------------------------------------------------------------
48# outgoing ed1 traffic - group 150
49# Setup outgoing DNS
50pass out log quick proto tcp/udp from any to 212.40.0.10 port = 53 keep state group 150
51pass out log quick proto tcp/udp from any to 212.40.5.50 port = 53 keep state group 150
52# allow outgoing http-service
53pass out log quick proto tcp from any to any port = 80 flags S/SA keep state keep frags group 150
54# allow outgoing smtp traffic
55pass out log quick proto tcp from 192.168.1.1/24 to any port = 25 flags S/SA keep state group 150
56# allow outgoing pop3 traffic
57pass out log quick proto tcp from 192.168.1.1/24 to any port = 110 flags S/SA keep state group 150
58# allow outgoing ftp traffic
59pass out log quick proto tcp/udp from 192.168.1.1/24 to any port = ftp keep state group 150
60pass out log quick proto icmp from any to any keep state keep frags group 150
61#--------------------------------------------------------------------------
62# incoming traffic on fxp0 - group 200
63#--------------------------------------------------------------------------
64# 1) prevent localhost spoofing
65block in log quick from 127.0.0.0/8 to any group 200
66block in log quick from 192.168.0.1/32 to any group 200
67block in log quick from 192.168.1.110/24 to any group 200
68pass in log quick from any to any group 200
69#--------------------------------------------------------------------------
70# outgoing traffic on fxp0 - group 250
71#--------------------------------------------------------------------------
72block out log quick from 127.0.0.0/8 to any group 250
73block out quick from any to 127.0.0.0/8 group 250
74block out log quick from any to 192.168.0.1/32 group 250
75pass out log quick from any to nay group 250
76#--------------------------------------------------------------------------
77