### 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_untrusted=eth0.1
-if_trusted=eth0.0
+if_dmz=eth0.0
+if_trusted=eth0.1
+if_safe=$if_dmz,$if_trusted
+if_untrusted=eth0.3
if_vpn=vpn-+
if_iodine=dns+
-if_its_mz=eth0.0
-if_its_pi=eth0.0
+if_its_mz=$if_dmz,$if_trusted
+if_its_pi=$if_dmz,$if_trusted
m4_divert(-1)
###--------------------------------------------------------------------------
dns iodine \
ssh \
smtp submission \
+ rdesktop \
gnutella_svc \
ftp ftp_data \
rsync \
gnutella_svc \
i2p
-## 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
+## Extend some services to local untrusted hosts.
+clearchain inbound-untrusted
+run iptables -A inbound -j inbound-untrusted \
+ -s 172.29.198.0/24
-## Allow smb and nmb to untrusted hosts. This is a bit experimental.
-run iptables -A inbound -j ACCEPT \
- -s 172.29.198.0/24 \
- -p udp -m multiport --destination-ports \
- $port_netbios_ns,$port_netbios_dgm
-run iptables -A inbound -j ACCEPT \
- -s 172.29.198.0/24 \
- -p tcp -m multiport --destination-ports \
- $port_netbios_ssn,$port_microsoft_ds
+allowservices inbound-untrusted tcp \
+ dns \
+ netbios_ssn microsoft_ds
+allowservices inbound-untrusted udp \
+ dns \
+ tftp
## Provide syslog for evolution.
run iptables -A inbound -j ACCEPT \
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 $if_dmz
+run iptables -t nat -A outbound -j RETURN ! -s 172.29.198.0/23
+run iptables -t nat -A outbound -j RETURN -d 62.49.204.144/28
+run iptables -t nat -A outbound -j RETURN -d 172.29.198.0/23
+run iptables -t nat -A outbound -j SNAT --to-source 62.49.204.158
+run iptables -t nat -A POSTROUTING -j outbound
+
+## Set up NAT protocol helpers. In particular, SIP needs some special
+## twiddling.
+run modprobe nf_conntrack_sip \
+ ports=5060 \
+ sip_direct_signalling=0 \
+ sip_direct_media=0
+for p in ftp sip h323; do
+ run modprobe nf_nat_$p
+done
+
m4_divert(-1)
###----- That's all, folks --------------------------------------------------