X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/blobdiff_plain/18b341c2f12a4a504a2960457a22690cf781623d..51988d089b81f995878ae55853f9f92e0beeb7f3:/radius.m4

diff --git a/radius.m4 b/radius.m4
index 7f0dc2c..4bf4cea 100644
--- a/radius.m4
+++ b/radius.m4
@@ -24,7 +24,7 @@
 ###--------------------------------------------------------------------------
 ### radius-specific rules.
 
-m4_divert(84)m4_dnl
+m4_divert(86)m4_dnl
 ## Externally visible services.
 allowservices inbound tcp \
 	ident \
@@ -69,5 +69,18 @@ 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
+
+## Forbid anything complicated to the NAT address.
+run iptables -A INPUT -d 62.49.204.158 ! -p icmp -j REJECT
+
 m4_divert(-1)
 ###----- That's all, folks --------------------------------------------------