~mdw / firewall / blame
| Commit | Line | Data |
|---|---|---|
| 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-+ | |
| f98dfdf6 | 32 | if_iodine=dns+ |
| bfdc045d MW |
33 | if_its_mz=eth0.0 |
| 34 | if_its_pi=eth0.0 | |
| 35 | ||
| 36 | m4_divert(-1) | |
| 37 | ###-------------------------------------------------------------------------- | |
| 38 | ### vampire-specific rules. | |
| 39 | ||
| 2dc8f4af MW |
40 | m4_divert(35)m4_dnl |
| 41 | errorchain ddos-evil-dns DROP | |
| 42 | ## Invalid DNS request with probably-forged sender address, with intent to | |
| 43 | ## cause DDOS. | |
| 44 | ||
| bfdc045d | 45 | m4_divert(82)m4_dnl |
| 83610d8a MW |
46 | ## Repelling evil DDos attack. |
| 47 | run ipset -N ddos-evil-dns iphash 2>/dev/null || : | |
| 2dc8f4af | 48 | run iptables -A inbound -g ddos-evil-dns \ |
| 83610d8a MW |
49 | -m set --set ddos-evil-dns src \ |
| 50 | -p udp --destination-port $port_dns | |
| 51 | ||
| bfdc045d MW |
52 | ## Externally visible services. |
| 53 | allowservices inbound tcp \ | |
| 54 | finger ident \ | |
| f98dfdf6 | 55 | dns iodine \ |
| bfdc045d MW |
56 | ssh \ |
| 57 | smtp \ | |
| 58 | gnutella_svc \ | |
| 59 | ftp ftp_data \ | |
| 60 | rsync \ | |
| e15ca5ab | 61 | disorder \ |
| bfdc045d MW |
62 | http https \ |
| 63 | git | |
| 78c56de1 MW |
64 | allowservices inbound tcp \ |
| 65 | tor_public tor_directory | |
| bfdc045d | 66 | allowservices inbound udp \ |
| f98dfdf6 | 67 | dns iodine \ |
| bfdc045d MW |
68 | tripe \ |
| 69 | gnutella_svc | |
| 70 | ||
| 71 | ## Provide DNS resolution to local untrusted hosts. | |
| 72 | for p in tcp udp; do | |
| 73 | run iptables -A inbound -j ACCEPT \ | |
| 74 | -s 172.29.198.0/24 \ | |
| 75 | -p $p --destination-port $port_dns | |
| 76 | done | |
| 77 | ||
| 78 | ## Provide syslog for evolution. | |
| 79 | run iptables -A inbound -j ACCEPT \ | |
| 80 | -s 172.29.198.2 \ | |
| 81 | -p udp --destination-port $port_syslog | |
| 82 | ||
| 83 | ## Provide a web cache to local untrusted hosts. | |
| 84 | run iptables -A inbound -j ACCEPT \ | |
| 85 | -s 172.29.198.0/24 \ | |
| 86 | -p tcp --destination-port $port_squid | |
| 87 | ||
| d6dd88f5 MW |
88 | ## Watch outgoing Tor usage. |
| 89 | run iptables -A OUTPUT -m multiport \ | |
| 90 | -p tcp --source-ports $port_tor_public,$port_tor_directory | |
| 91 | ||
| bfdc045d MW |
92 | ## Other interesting things. |
| 93 | dnsresolver inbound | |
| 94 | ntpclient inbound 158.152.1.76 158.152.1.204 194.159.253.2 | |
| 95 | ||
| 96 | m4_divert(-1) | |
| 97 | ###----- That's all, folks -------------------------------------------------- |