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bfdc045d MW |
1 | ### -*-m4-*- |
2 | ### | |
3 | ### Firewall configuration for vampire | |
4 | ### | |
5 | ### (c) 2008 Mark Wooding | |
6 | ### | |
7 | ||
8 | ###----- Licensing notice --------------------------------------------------- | |
9 | ### | |
10 | ### This program is free software; you can redistribute it and/or modify | |
11 | ### it under the terms of the GNU General Public License as published by | |
12 | ### the Free Software Foundation; either version 2 of the License, or | |
13 | ### (at your option) any later version. | |
14 | ### | |
15 | ### This program is distributed in the hope that it will be useful, | |
16 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ### GNU General Public License for more details. | |
19 | ### | |
20 | ### You should have received a copy of the GNU General Public License | |
21 | ### along with this program; if not, write to the Free Software Foundation, | |
22 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | ||
24 | ###-------------------------------------------------------------------------- | |
25 | ### Network interfaces. | |
26 | ||
27 | m4_divert(44)m4_dnl | |
28 | ## Interface definitions. | |
29 | if_untrusted=eth0.1 | |
30 | if_trusted=eth0.0 | |
31 | if_vpn=vpn-+ | |
32 | if_its_mz=eth0.0 | |
33 | if_its_pi=eth0.0 | |
34 | ||
35 | m4_divert(-1) | |
36 | ###-------------------------------------------------------------------------- | |
37 | ### vampire-specific rules. | |
38 | ||
2dc8f4af MW |
39 | m4_divert(35)m4_dnl |
40 | errorchain ddos-evil-dns DROP | |
41 | ## Invalid DNS request with probably-forged sender address, with intent to | |
42 | ## cause DDOS. | |
43 | ||
bfdc045d | 44 | m4_divert(82)m4_dnl |
83610d8a MW |
45 | ## Repelling evil DDos attack. |
46 | run ipset -N ddos-evil-dns iphash 2>/dev/null || : | |
2dc8f4af | 47 | run iptables -A inbound -g ddos-evil-dns \ |
83610d8a MW |
48 | -m set --set ddos-evil-dns src \ |
49 | -p udp --destination-port $port_dns | |
50 | ||
bfdc045d MW |
51 | ## Externally visible services. |
52 | allowservices inbound tcp \ | |
53 | finger ident \ | |
54 | dns \ | |
55 | ssh \ | |
56 | smtp \ | |
57 | gnutella_svc \ | |
58 | ftp ftp_data \ | |
59 | rsync \ | |
04182f26 | 60 | mpd \ |
bfdc045d MW |
61 | http https \ |
62 | git | |
78c56de1 MW |
63 | allowservices inbound tcp \ |
64 | tor_public tor_directory | |
bfdc045d MW |
65 | allowservices inbound udp \ |
66 | dns \ | |
67 | tripe \ | |
68 | gnutella_svc | |
69 | ||
70 | ## Provide DNS resolution to local untrusted hosts. | |
71 | for p in tcp udp; do | |
72 | run iptables -A inbound -j ACCEPT \ | |
73 | -s 172.29.198.0/24 \ | |
74 | -p $p --destination-port $port_dns | |
75 | done | |
76 | ||
77 | ## Provide syslog for evolution. | |
78 | run iptables -A inbound -j ACCEPT \ | |
79 | -s 172.29.198.2 \ | |
80 | -p udp --destination-port $port_syslog | |
81 | ||
82 | ## Provide a web cache to local untrusted hosts. | |
83 | run iptables -A inbound -j ACCEPT \ | |
84 | -s 172.29.198.0/24 \ | |
85 | -p tcp --destination-port $port_squid | |
86 | ||
d6dd88f5 MW |
87 | ## Watch outgoing Tor usage. |
88 | run iptables -A OUTPUT -m multiport \ | |
89 | -p tcp --source-ports $port_tor_public,$port_tor_directory | |
90 | ||
bfdc045d MW |
91 | ## Other interesting things. |
92 | dnsresolver inbound | |
93 | ntpclient inbound 158.152.1.76 158.152.1.204 194.159.253.2 | |
94 | ||
95 | m4_divert(-1) | |
96 | ###----- That's all, folks -------------------------------------------------- |