~mdw / firewall / blame
| Commit | Line | Data |
|---|---|---|
| 775bd287 | 1 | ### -*-sh-*- |
| bfdc045d | 2 | ### |
| a3972fea | 3 | ### Firewall configuration for jem |
| bfdc045d MW |
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 | ###-------------------------------------------------------------------------- | |
| a3972fea MW |
25 | ### Config settings. |
| 26 | ||
| 27 | ## This host isn't a router. | |
| 28 | setconf(forward, 0) | |
| 29 | ||
| 08926d25 MW |
30 | ## This host is involved in a routing asymmetry. |
| 31 | setconf(rp_filter, 0) | |
| 32 | setconf(log_martians, 0) | |
| 33 | ||
| a3972fea | 34 | ###-------------------------------------------------------------------------- |
| bfdc045d MW |
35 | ### Network interfaces. |
| 36 | ||
| 37 | m4_divert(44)m4_dnl | |
| 38 | ## Interface definitions. | |
| 08926d25 MW |
39 | if_dmz=eth0 |
| 40 | if_trusted=eth1 | |
| 41 | if_safe=$if_dmz,$if_trusted | |
| 42 | if_untrusted=$if_dmz,$if_trusted | |
| 43 | if_vpn=$if_dmz,$if_trusted | |
| 44 | if_iodine=$if_dmz,$if_trusted | |
| 45 | if_its_mz=$if_dmz,$if_trusted | |
| 46 | if_its_pi=$if_dmz,$if_trusted | |
| bfdc045d MW |
47 | |
| 48 | m4_divert(-1) | |
| 49 | ###-------------------------------------------------------------------------- | |
| a3972fea | 50 | ### jem-specific rules. |
| bfdc045d MW |
51 | |
| 52 | m4_divert(82)m4_dnl | |
| 302fff40 MW |
53 | ## Set up the SAUCE sinbin. Unfortunately, ipset is a bit brittle. This |
| 54 | ## isn't a completely critical part of the firewall security, so don't make | |
| 55 | ## this fail the entire script. | |
| 56 | errorchain sauce REJECT | |
| 57 | makeset sauce iphash || : | |
| 58 | iptables -A inbound -g sauce -m set --match-set sauce src || : | |
| 59 | ||
| bfdc045d MW |
60 | ## Externally visible services. |
| 61 | allowservices inbound tcp \ | |
| bfdc045d | 62 | ssh \ |
| 6f74cc82 | 63 | ident \ |
| 77e84a02 | 64 | smtp submission \ |
| bfdc045d | 65 | http https \ |
| a3972fea | 66 | imaps |
| bfdc045d MW |
67 | |
| 68 | ## Provide DNS resolution to local untrusted hosts. | |
| 69 | for p in tcp udp; do | |
| 70 | run iptables -A inbound -j ACCEPT \ | |
| 71 | -s 172.29.198.0/24 \ | |
| 72 | -p $p --destination-port $port_dns | |
| 73 | done | |
| 74 | ||
| bfdc045d MW |
75 | m4_divert(-1) |
| 76 | ###----- That's all, folks -------------------------------------------------- |