X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/blobdiff_plain/a3972fea9c58e172fb2a1c1dc7362ec6a40fa4bd..f656160243550acb5f02d53acdf7750cfbade2a8:/radius.m4

diff --git a/radius.m4 b/radius.m4
index b97f481..4bf4cea 100644
--- a/radius.m4
+++ b/radius.m4
@@ -22,24 +22,12 @@
 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 ###--------------------------------------------------------------------------
-### Network interfaces.
-
-m4_divert(44)m4_dnl
-## Interface definitions.
-if_untrusted=eth1
-if_trusted=eth0
-if_vpn=eth0
-if_iodine=eth0
-if_its_mz=eth0
-if_its_pi=eth0
-
-m4_divert(-1)
-###--------------------------------------------------------------------------
 ### radius-specific rules.
 
-m4_divert(82)m4_dnl
+m4_divert(86)m4_dnl
 ## Externally visible services.
 allowservices inbound tcp \
+	ident \
 	dns iodine \
 	ssh
 allowservices inbound udp \
@@ -60,7 +48,39 @@ run iptables -A inbound -j ACCEPT \
 
 ## Other interesting things.
 dnsresolver inbound
-ntpclient inbound 158.152.1.76 158.152.1.204 194.159.253.2
+
+## IPv6 6-in-4 tunnel.
+run iptables -A inbound -j ACCEPT \
+	-p $proto_ipv6 -s 216.66.80.26
+
+## 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 $i 2>/dev/null || :
+done
+run iptables -t nat -F
+run iptables -t nat -X
+
+run iptables -t nat -N outbound
+run iptables -t nat -A outbound -j RETURN ! -o eth0
+run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23
+run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28
+run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23
+run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158
+run iptables -t nat -A POSTROUTING -j outbound
+
+## Set up NAT protocol helpers.  In particular, SIP needs some special
+## twiddling.
+run modprobe nf_conntrack_sip \
+  ports=5060 \
+  sip_direct_signalling=0 \
+  sip_direct_media=0
+for p in ftp sip h323; do
+  run modprobe nf_nat_$p
+done
+
+## 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 --------------------------------------------------