3 ### Firewall configuration for fender actual
5 ### (c) 2008 Mark Wooding
8 ###----- Licensing notice ---------------------------------------------------
10 ### This program is free software; you can redistribute it and/or modify
11 ### it under the terms of the GNU General Public License as published by
12 ### the Free Software Foundation; either version 2 of the License, or
13 ### (at your option) any later version.
15 ### This program is distributed in the hope that it will be useful,
16 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ### GNU General Public License for more details.
20 ### You should have received a copy of the GNU General Public License
21 ### along with this program; if not, write to the Free Software Foundation,
22 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 ###--------------------------------------------------------------------------
25 ### fender-specific rules.
28 ## Externally visible services.
29 allowservices inbound tcp \
33 ## We have to provide NTP service. The guests sync to our clock.
34 ntpclient inbound $ntp_servers
36 ## Guaranteed black hole. Put this at the very front of the chain.
37 run iptables -I INPUT -d 212.13.198.78 -j DROP
38 run ip6tables -I INPUT -d 2001:ba8:0:1d9::ffff -j DROP
40 ## Ethernet bridge-level filtering for source addresses.
42 for i in log limit ip ip6; do run modprobe ebt-$i; done
44 for c in bad-source-addr check-eth0; do
45 run ebtables -X $c >/dev/null 2>&1 || :
48 run ebtables -N bad-source-addr
49 run ebtables -A bad-source-addr \
50 --limit 20/second --limit-burst 100 \
51 --log-prefix "fw: bad-source-addr(br) " --log-ip --log-ip6
52 run ebtables -A bad-source-addr -j DROP
54 run ebtables -N check-eth0
55 run ebtables -A check-eth0 -j RETURN -p ip --ip-source ! 212.13.198.64/28
56 run ebtables -A check-eth0 -j RETURN -p ip6 --ip6-source 2001:ba8:0:1d9::1
57 run ebtables -A check-eth0 -j bad-source-addr \
58 -p ip6 --ip6-source 2001:ba8:1d9::/48
59 run ebtables -A check-eth0 -j bad-source-addr \
60 -p ip6 --ip6-source 2001:ba8:0:1d9::/64
61 run ebtables -A check-eth0 -j RETURN -p ip6
62 run ebtables -A check-eth0 -j RETURN -p ip --ip-source 212.13.198.64/30
63 run ebtables -A check-eth0 -j RETURN -p ip --ip-source 212.13.198.68
64 run ebtables -A check-eth0 -j bad-source-addr -p ip
65 run ebtables -A INPUT -j check-eth0 -i bond0
66 run ebtables -A FORWARD -j check-eth0 -i bond0
69 ###----- That's all, folks --------------------------------------------------