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raw.rules @ b9ae53a

trunk

Last change on this file since b9ae53a was c8daa69, checked in by mitty <mitty@…>, 15 years ago

FIX: increase acceptable icmp packet size limit

ping 192.168.100.254 -n 1

PING 1 (0.0.0.1) 56(124) bytes of data.
--- 1 ping statistics ---
23 packets transmitted, 0 received, 100% packet loss, time 22381ms

git-svn-id: https://lab.mitty.jp/svn/lab/trunk@15 7d2118f6-f56c-43e7-95a2-4bb3031d96e7

File size: 1.3 KB

Line
1	#
2	# This file is used by /etc/init.d/setfilter
3	#
4	# Rules that should be stored in raw table.
5	# These are mainly used to filter evil or wrong packets.
6
7
8	*raw
9	:LOG_ICMP - [0:0]
10	:LOG_SPOOF - [0:0]
11
12	## LOG and DROP fragmented packets (not head fragments)
13	-A PREROUTING --fragment -j LOG --log-prefix "[UFW BLOCK FRAGMENTED]: " --log-level err -m limit --limit 3/min --limit-burst 10
14	-A PREROUTING --fragment -j DROP
15
16	## LOG and DROP strange icmp packets
17	-A LOG_ICMP -j LOG --log-prefix "[UFW BLOCK BAD-ICMP]: " --log-level err -m limit --limit 3/min --limit-burst 10
18	-A LOG_ICMP -j DROP
19	# Too large icmp requests
20	-A PREROUTING -p icmp --icmp-type echo-request -m length --length 128: -j LOG_ICMP
21	# Too many times of icmp requests (only 5 packets per second if over 10pkts/sec)
22	-A PREROUTING -p icmp --icmp-type echo-request -m limit --limit 5/s --limit-burst 10 -j ACCEPT
23	-A PREROUTING -p icmp --icmp-type echo-request -j LOG_ICMP
24
25	## LOG and DROP IP spoofing (eth1:WAN)
26	-A LOG_SPOOF -j LOG --log-prefix "[UFW BLOCK IP-SPOOFING]: " --log-level err -m limit --limit 3/min --limit-burst 10
27	-A LOG_SPOOF -j DROP
28	-A PREROUTING -i eth1 -s 127.0.0.0/8 -j LOG_SPOOF
29	-A PREROUTING -i eth1 -s 10.0.0.0/8 -j LOG_SPOOF
30	-A PREROUTING -i eth1 -s 172.16.0.0/12 -j LOG_SPOOF
31	-A PREROUTING -i eth1 -s 192.168.0.0/16 -j LOG_SPOOF
32
33	COMMIT

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