X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/blobdiff_plain/16838f5907ea531799a81a693667c3d3d03737b0..f513127acd3ccf2f6ec695ba5d9396739bd21aba:/vampire.m4

diff --git a/vampire.m4 b/vampire.m4
index fa79ee2..44eef03 100644
--- a/vampire.m4
+++ b/vampire.m4
@@ -31,6 +31,7 @@ allowservices inbound tcp \
 	dns iodine \
 	ssh \
 	smtp submission \
+	rdesktop \
 	gnutella_svc \
 	ftp ftp_data \
 	rsync \
@@ -70,5 +71,31 @@ run iptables -A OUTPUT -m multiport \
 dnsresolver inbound
 ntpclient inbound $ntp_servers
 
+## NAT for RFC1918 addresses.
+for i in PREROUTING OUTPUT POSTROUTING; do
+  run iptables -t nat -P $i ACCEPT 2>/dev/null || :
+  run iptables -t nat -F $i 2>/dev/null || :
+done
+run iptables -t nat -F
+run iptables -t nat -X
+
+run iptables -t nat -N outbound
+run iptables -t nat -A outbound -j RETURN ! -o eth0.0
+run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23
+run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28
+run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23
+run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158
+run iptables -t nat -A POSTROUTING -j outbound
+
+## Set up NAT protocol helpers.  In particular, SIP needs some special
+## twiddling.
+run modprobe nf_conntrack_sip \
+  ports=5060 \
+  sip_direct_signalling=0 \
+  sip_direct_media=0
+for p in ftp sip h323; do
+  run modprobe nf_nat_$p
+done
+
 m4_divert(-1)
 ###----- That's all, folks --------------------------------------------------