I am relatively new to iptables. I have set up some basic rules for my
web server to allow only SSH and HTTP traffic (listed below). But I am
finding some log entries showing packets that were trying to connect to
port 80 getting logged (and dropped).
I can't understand why these packets were logged as I thought my rules
would let through any packet trying to connect to port 80.
# iptables -n -v -L
Chain INPUT (policy DROP 279 packets, 14864 bytes)
pkts bytes target prot opt in out source
destination
238 47040 ACCEPT all -- lo * 0.0.0.0/0
0.0.0.0/0
366M 21G ACCEPT all -- * * 0.0.0.0/0
0.0.0.0/0 state RELATED,ESTABLISHED
2199K 120M ACCEPT tcp -- eth0 * 0.0.0.0/0
203.179.86.66 state NEW,RELATED,ESTABLISHED tcp dpt:80
38 1824 ACCEPT tcp -- eth0 * 219.118.175.0/24
203.179.86.66 state NEW,RELATED,ESTABLISHED tcp dpt:22
0 0 DROP udp -- * * 0.0.0.0/0
0.0.0.0/0 udp dpt:67
0 0 REJECT tcp -- * * 0.0.0.0/0
0.0.0.0/0 tcp dpt:113 reject-with tcp-reset
0 0 REJECT udp -- * * 0.0.0.0/0
0.0.0.0/0 udp dpt:137 reject-with icmp-port-unreachable
0 0 REJECT udp -- * * 0.0.0.0/0
0.0.0.0/0 udp dpt:138 reject-with icmp-port-unreachable
0 0 REJECT tcp -- * * 0.0.0.0/0
0.0.0.0/0 tcp dpt:138 reject-with icmp-port-unreachable
0 0 REJECT udp -- * * 0.0.0.0/0
0.0.0.0/0 udp dpt:139 reject-with icmp-port-unreachable
279 14864 LOG all -- * * 0.0.0.0/0
0.0.0.0/0 LOG flags 0 level 7 prefix `DROP:'
Here is one of those log entries:
kernel: DROP:IN=eth0 OUT= MAC=00:d0:b7:e1:13:e7:00:90:fe:1e:50:a6:08:00
SRC=66.69.93.167 DST=203.179.86.66 LEN=40 TOS=0x00 PREC=0x00 TTL=105
ID=8622 DF PROTO=TCP SPT=1439 DPT=80 WINDOW=64952 RES=0x00 ACK URGP=0
Can someone help me understand why this packet was dropped?
Thanks,
Jean-Christian Imbeault
