~mdw / firewall / blame
| Commit | Line | Data |
|---|---|---|
| 775bd287 | 1 | ### -*-sh-*- |
| bfdc045d | 2 | ### |
| a3972fea | 3 | ### Firewall configuration for radius |
| 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 | ###-------------------------------------------------------------------------- | |
| 08926d25 MW |
25 | ### Config settings. |
| 26 | ||
| 27 | ## This router is involved in a routing asymmetry. | |
| 28 | setconf(rp_filter, 0) | |
| 29 | setconf(log_martians, 0) | |
| 30 | ||
| 31 | ###-------------------------------------------------------------------------- | |
| bfdc045d MW |
32 | ### Network interfaces. |
| 33 | ||
| 34 | m4_divert(44)m4_dnl | |
| 35 | ## Interface definitions. | |
| 08926d25 MW |
36 | if_dmz=eth0 |
| 37 | if_trusted=eth1 | |
| 38 | if_safe=eth2 | |
| 39 | if_untrusted=eth3 | |
| 40 | if_vpn=$if_dmz,$if_trusted | |
| 41 | if_iodine=$if_dmz,$if_trusted | |
| 42 | if_its_mz=$if_dmz,$if_trusted | |
| 43 | if_its_pi=$if_dmz,$if_trusted | |
| bfdc045d MW |
44 | |
| 45 | m4_divert(-1) | |
| 46 | ###-------------------------------------------------------------------------- | |
| a3972fea | 47 | ### radius-specific rules. |
| bfdc045d MW |
48 | |
| 49 | m4_divert(82)m4_dnl | |
| 50 | ## Externally visible services. | |
| 51 | allowservices inbound tcp \ | |
| 6f74cc82 | 52 | ident \ |
| a3972fea MW |
53 | dns iodine \ |
| 54 | ssh | |
| bfdc045d | 55 | allowservices inbound udp \ |
| a3972fea MW |
56 | dns iodine \ |
| 57 | tripe | |
| bfdc045d MW |
58 | |
| 59 | ## Provide DNS resolution to local untrusted hosts. | |
| 60 | for p in tcp udp; do | |
| 61 | run iptables -A inbound -j ACCEPT \ | |
| 62 | -s 172.29.198.0/24 \ | |
| 63 | -p $p --destination-port $port_dns | |
| 64 | done | |
| 65 | ||
| a3972fea MW |
66 | ## Provide syslog for evolution. |
| 67 | run iptables -A inbound -j ACCEPT \ | |
| 68 | -s 172.29.198.2 \ | |
| 69 | -p udp --destination-port $port_syslog | |
| 70 | ||
| bfdc045d MW |
71 | ## Other interesting things. |
| 72 | dnsresolver inbound | |
| bfdc045d | 73 | |
| 27ca7c0e MW |
74 | ## NAT for RFC1918 addresses. |
| 75 | for i in PREROUTING OUTPUT POSTROUTING; do | |
| 76 | run iptables -t nat -P $i ACCEPT 2>/dev/null || : | |
| 77 | run iptables -t nat -F $i 2>/dev/null || : | |
| 78 | done | |
| 79 | run iptables -t nat -F | |
| 80 | run iptables -t nat -X | |
| 81 | ||
| 82 | run iptables -t nat -N outbound | |
| 83 | run iptables -t nat -A outbound -j RETURN ! -o $if_dmz | |
| 84 | run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23 | |
| 85 | run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28 | |
| 86 | run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23 | |
| 87 | run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158 | |
| 88 | run iptables -t nat -A POSTROUTING -j outbound | |
| 89 | ||
| bfdc045d MW |
90 | m4_divert(-1) |
| 91 | ###----- That's all, folks -------------------------------------------------- |