Host changeover.

[firewall] / jem.m4

diff --git a/jem.m4 b/jem.m4
new file mode 100644 (file)
index 0000000..f9922c9
--- /dev/null
+++ b/jem.m4
@@ -0,0 +1,72 @@
+### -*-sh-*-
+###
+### Firewall configuration for jem
+###
+### (c) 2008 Mark Wooding
+###
+
+###----- Licensing notice ---------------------------------------------------
+###
+### This program is free software; you can redistribute it and/or modify
+### it under the terms of the GNU General Public License as published by
+### the Free Software Foundation; either version 2 of the License, or
+### (at your option) any later version.
+###
+### This program is distributed in the hope that it will be useful,
+### but WITHOUT ANY WARRANTY; without even the implied warranty of
+### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+### GNU General Public License for more details.
+###
+### You should have received a copy of the GNU General Public License
+### along with this program; if not, write to the Free Software Foundation,
+### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+###--------------------------------------------------------------------------
+### Config settings.
+
+## This host isn't a router.
+setconf(forward, 0)
+
+###--------------------------------------------------------------------------
+### Network interfaces.
+
+m4_divert(44)m4_dnl
+## Interface definitions.
+if_untrusted=eth0
+if_trusted=eth0
+if_vpn=eth0
+if_iodine=eth0
+if_its_mz=eth0
+if_its_pi=eth0
+
+m4_divert(-1)
+###--------------------------------------------------------------------------
+### jem-specific rules.
+
+m4_divert(82)m4_dnl
+## Externally visible services.
+allowservices inbound tcp \
+       ssh \
+       smtp submission \
+       http https \
+       imaps
+
+## Provide DNS resolution to local untrusted hosts.
+for p in tcp udp; do
+  run iptables -A inbound -j ACCEPT \
+         -s 172.29.198.0/24 \
+         -p $p --destination-port $port_dns
+done
+
+## Allow smb and nmb to untrusted hosts.  This is a bit experimental.
+run iptables -A inbound -j ACCEPT \
+       -s 172.29.198.0/24 \
+       -p udp -m multiport --destination-ports \
+               $port_netbios_ns,$port_netbios_dgm
+run iptables -A inbound -j ACCEPT \
+       -s 172.29.198.0/24 \
+       -p tcp -m multiport --destination-ports \
+               $port_netbios_ssn,$port_microsoft_ds
+
+m4_divert(-1)
+###----- That's all, folks --------------------------------------------------