From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 24 Mar 2012 17:07:36 +0000 (+0000)
Subject: Merge remote-tracking branch 'origin' into emergency
X-Git-Url: https://git.distorted.org.uk/~mdw/firewall/commitdiff_plain/b4d07df30bdd2132a03de9a22512560d585d918a?hp=ebaa31a7bdb640c1bd797fef04d1e833a34c07d7

Merge remote-tracking branch 'origin' into emergency

* origin:
  local.m4: A new network for the SGO VPN.
  functions.m4, classify.m4: Handle negative address ranges.
  Make FW_NOACT work properly.

Conflicts:
	local.m4
---

diff --git a/bookends.m4 b/bookends.m4
index f451c8d..9757a38 100644
--- a/bookends.m4
+++ b/bookends.m4
@@ -108,11 +108,17 @@ m4_divert(32)m4_dnl
 ## Set forwarding options.  Apparently setting ip_forward clobbers other
 ## settings, so put this first.
 case $host_type_<::>FWHOST in
-  router) forward=1 ;;
-  *) forward=0 ;;
+  router) forward=1 host=0 ;;
+  server) forward=0 host=0 ;;
+  client) forward=0 host=1 ;;
 esac
 setopt ip_forward $forward
 setdevopt forwarding $forward
+for i in \
+  accept_ra accept_ra_defrtr accept_ra_pinfo accept_ra_info_max_plen
+do
+  setdevopt $i $host
+done
 case $forward in
   0) inchains="INPUT" ;;
   1) inchains="INPUT FORWARD" ;;
diff --git a/functions.m4 b/functions.m4
index 16c07c8..c3609a5 100644
--- a/functions.m4
+++ b/functions.m4
@@ -183,7 +183,7 @@ setdevopt () {
     for ver in ipv4 ipv6; do
       if [ -f /proc/sys/net/$ver/conf/$i/$opt ]; then
 	any=t
-	run sysctl -q net/ipv4/conf/$i/$opt="$val"
+	run sysctl -q net/$ver/conf/$i/$opt="$val"
       fi
     done
     case $any in
@@ -513,14 +513,19 @@ host () {
 defhost () {
   host=$1
   addword allhosts $host
-  eval host_type_$host=endsys
+  eval host_type_$host=server
 }
 
-## router
+## hosttype TYPE
 ##
-## Declare the host to be a router, so it should forward packets and so on.
-router () {
-  eval host_type_$host=router
+## Declare the host to have the given type.
+hosttype () {
+  type=$1
+  case $type in
+    router | server | client) ;;
+     *) echo >&2 "$0: bad host type \`$type'"; exit 1 ;;
+  esac
+  eval host_type_$host=$type
 }
 
 ## iface IFACE NET ...
diff --git a/local.m4 b/local.m4
index 357043b..ba09c39 100644
--- a/local.m4
+++ b/local.m4
@@ -71,7 +71,7 @@ defnet housebdry virtual
 
 ## House hosts.
 defhost radius
-	router
+	hosttype router
 	iface eth0 dmz unsafe safe
 	iface eth1 dmz unsafe safe
 	iface eth2 safe
@@ -86,11 +86,11 @@ defhost artist
 	iface eth0 dmz unsafe
 	iface eth1 dmz unsafe
 defhost vampire
-	router
-	iface eth0.0 dmz unsafe safe
-	iface eth0.1 dmz unsafe safe
+	hosttype router
+	iface eth0.0 dmz unsafe safe default
+	iface eth0.1 dmz unsafe safe default
 	iface eth0.2 safe
-	iface eth0.3 untrusted
+	iface eth0.3 untrusted default
 	iface dns0 iodine
 	iface vpn-precision colobdry vpn
 	iface vpn-chiark sgo
@@ -100,6 +100,7 @@ defhost ibanez
 	iface br-unsafe unsafe
 
 defhost gibson
+	hosttype client
 	iface eth0 unsafe
 
 ## Colocated networks.
@@ -120,7 +121,7 @@ defhost fender
 	iface br-jump jump colo
 	iface br-colo jump colo
 defhost precision
-	router
+	hosttype router
 	iface eth0 jump colo
 	iface eth1 jump colo
 	iface vpn-vampire housebdry vpn
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 b3257c7..d283145 100644
--- a/vampire.m4
+++ b/vampire.m4
@@ -70,5 +70,38 @@ run iptables -A OUTPUT -m multiport \
 dnsresolver inbound
 ntpclient inbound $ntp_servers
 
+## 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 $i 2>/dev/null || :
+done
+run iptables -t nat -F
+run iptables -t nat -X
+
+run iptables -t nat -N outbound
+run iptables -t nat -A outbound -j RETURN ! -o eth0.0
+run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23
+run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28
+run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23
+run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158
+run iptables -t nat -A POSTROUTING -j outbound
+
+## Set up NAT protocol helpers.  In particular, SIP needs some special
+## twiddling.
+run modprobe nf_conntrack_sip \
+  ports=5060 \
+  sip_direct_signalling=0 \
+  sip_direct_media=0
+for p in ftp sip h323; do
+  run modprobe nf_nat_$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 --------------------------------------------------