local.m4: Fix whitespace oddity.

[firewall] / radius.m4

diff --git a/radius.m4 b/radius.m4
index b88293f..d8efa4f 100644 (file)
--- a/radius.m4
+++ b/radius.m4
@@ -22,47 +22,16 @@
 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 ###--------------------------------------------------------------------------
-### Config settings.
-
-## This router is involved in a routing asymmetry.
-setconf(rp_filter, 0)
-setconf(log_martians, 0)
-
-###--------------------------------------------------------------------------
-### Network interfaces.
-
-m4_divert(44)m4_dnl
-## Interface definitions.
-if_dmz=eth0
-if_trusted=eth1
-if_safe=eth2
-if_untrusted=eth3
-if_vpn=$if_dmz,$if_trusted
-if_iodine=$if_dmz,$if_trusted
-if_its_mz=$if_dmz,$if_trusted
-if_its_pi=$if_dmz,$if_trusted
-
-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 \
-       dns iodine \
        tripe
 
-## Provide DNS resolution to local untrusted hosts.
-for p in tcp udp; do
-  run iptables -A inbound -j ACCEPT \
-         -s 172.29.198.0/24 \
-         -p $p --destination-port $port_dns
-done
-
 ## Provide syslog for evolution.
 run iptables -A inbound -j ACCEPT \
        -s 172.29.198.2 \
@@ -70,6 +39,29 @@ run iptables -A inbound -j ACCEPT \
 
 ## Other interesting things.
 dnsresolver inbound
+dnsserver inbound
+
+## IPv6 6-in-4 tunnel.
+run iptables -A inbound -j ACCEPT \
+       -p $proto_ipv6 -s 216.66.80.26
+
+## Permitted special forwarding.
+makeset fwd-allow-http nethash || :
+iptables -A fwd-spec-nofrag -j ACCEPT \
+       -m set --match-set fwd-allow-http dst \
+       -p tcp --destination-port $port_http \
+       -m mark --mark $to_untrusted/$MASK_TO
+iptables -A fwd-spec-nofrag -j ACCEPT \
+       -m set --match-set fwd-allow-http src \
+       -p tcp --destination-port $port_http \
+       -m mark --mark $from_untrusted/$MASK_FROM \
+       -m state --state ESTABLISHED
+
+## BCP38 filtering.  Note that addresses here are seen before NAT is applied.
+bcp38 4 ppp0 62.49.204.144/28 172.29.198.0/23
+bcp38 6 t6-he \
+       2001:470:1f08:1b98::2 2001:470:1f09:1b98::/64 \
+       2001:470:9740::/48
 
 ## NAT for RFC1918 addresses.
 for i in PREROUTING OUTPUT POSTROUTING; do
@@ -80,12 +72,38 @@ 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 ! -o ppp0
 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
+
+## An awful hack.
+##run iptables -t nat -A outbound -j DNETMAP --reuse \
+##     -s 172.29.199.44 --prefix 62.49.204.157
+##run iptables -t nat -A outbound -j DNETMAP --reuse \
+##     -s 172.29.198.34 --prefix 62.49.204.157
+##run iptables -t nat -A outbound -j DNETMAP --reuse \
+##     -s 172.29.198.11 --prefix 62.49.204.157
+##run iptables -t nat -A PREROUTING -j DNETMAP
+
 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.  Be sure to allow ident,
+## though.
+run iptables -A INPUT -d 62.49.204.158 -p tcp -j ACCEPT \
+       -m multiport --destination-ports=113
+run iptables -A INPUT -d 62.49.204.158 ! -p icmp -j REJECT
+
 m4_divert(-1)
 ###----- That's all, folks --------------------------------------------------