[CentOS] iptables: forwarding on internal device
Marcus Moeller
mm at gcug.de
Mon Feb 9 13:23:02 UTC 2009
Hi,
>> iptables -L -v now shows:
>>
>> 0 0 ACCEPT all -- eth0 eth0 anywhere
>> anywhere state NEW,RELATED,ESTABLISHED
>>
>> But the packages are still dropped:
>>
>> Feb 9 10:48:20 firewall kernel: DROP-TCP IN=eth0 OUT=eth0
>> SRC=192.168.100.192 DST=172.28.2.161 LEN=44 TOS=0x00 PREC=0x00 TTL=59
>> ID=54 PROTO=TCP SPT=9100 DPT=4068 WINDOW=0 RES=0x00 ACK SYN URGP=0
>>
>>
> My guess is will ACCEPT packets but since you haven't defined
> a FORWARD or an OUPUT chain it drops them.
As mentioned, I have added a rule like:
/sbin/iptables -A FORWARD -i eth0 -o eth0 -m state --state
NEW,RELATED,ESTABLISHED -j ACCEPT
to forward packages on the internal device.
Best Regards
Marcus
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