radius.m4: Take over NAT duties.

As the main internal router, radius now takes responsibility for appling
SNAT to outbound connections from internal hosts.

diff --git a/radius.m4 b/radius.m4
index b2c41ed..f6c892b 100644 (file)
--- a/radius.m4
+++ b/radius.m4
@@ -70,5 +70,21 @@ run iptables -A inbound -j ACCEPT \
 ## Other interesting things.
 dnsresolver inbound
 
+## 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 $if_dmz
+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
+
 m4_divert(-1)
 ###----- That's all, folks --------------------------------------------------