From: Mark Wooding <mdw@distorted.org.uk>
Date: Tue, 6 Mar 2012 10:43:58 +0000 (+0000)
Subject: Merge branch 'master' into emergency
X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/commitdiff_plain/fd965cc4be6fe6de25b3011aea708c41c3cd9e11?hp=dad380658e5cb8f7233bc5f8ab328a2959f9f6ce

Merge branch 'master' into emergency

* master:
  radius.m4: Forbid traffic directly to the NAT address.
  radius.m4: Use the correct interface name for NAT.
  local.m4: Fix IGMP acceptance (debris from old interface declarations).
---

diff --git a/numbers.m4 b/numbers.m4
index d5ab0c1..c94ae5f 100644
--- a/numbers.m4
+++ b/numbers.m4
@@ -49,6 +49,7 @@ defport rsync 873
 defport imaps 993
 defport h323 1720
 defport squid 3128
+defport rdesktop 3389
 defport tripe 4070
 defport siplo 5000
 defport siphi 5100
diff --git a/vampire.m4 b/vampire.m4
index fa79ee2..9d8cdce 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 +71,34 @@ 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
+
+## 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 --------------------------------------------------