topic Re: network trace log to kernel log file in Operating System - Linux

network trace log to kernel log file

Tammy Liang — Fri, 15 Jun 2007 09:30:29 GMT

There is network trace keep logging into kernel log file which filled up /var file system. How can I turn off this network trace log message, so won't put a line to kernel.log file evey time some one connect to this system via eth0 card?

Tks.

Tammy

Re: network trace log to kernel log file

Ivan Ferreira — Fri, 15 Jun 2007 09:57:48 GMT

Please post a sample record. Probably is caused by some iptables rules that LOGS the packets.

You should check your iptables rules.

Re: network trace log to kernel log file

Tammy Liang — Fri, 15 Jun 2007 10:27:13 GMT

How can I check iptable rules?
Below are the lines log to both dmesg.log and kernel.log files.

BANDWIDTH_IN:IN=eth0 OUT= MAC=00:18:fe:71:31:11:00:13:72:a9:4e:a7:08:00 src=10.99.66.45 DST=10.99.66.43 LEN=53 TOS=0x00 PREC=0x00 TTL=128 ID=27450 DF PROTO=TCP SPT=1088 DPT=1521 WINDOW=16849 RES=0x00 ACK PSH URGP=0
BANDWIDTH_OUT:IN= OUT=eth0 src=10.99.66.43 DST=10.99.66.45 LEN=57 TOS=0x00 PREC=0x00 TTL=64 ID=9796 DF PROTO=TCP SPT=1521 DPT=1088 WINDOW=32767 RES=0x00 ACK PSH URGP=0
BANDWIDTH_IN:IN=eth0 OUT= MAC=00:18:fe:71:31:11:00:13:72:a9:4e:a7:08:00 src=10.99.66.45 DST=10.99.66.43 LEN=40 TOS=0x00 PREC=0x00 TTL=128 ID=27462 DF PROTO=TCP SPT=1088 DPT=1521 WINDOW=16832 RES=0x00 ACK URGP=0

Re: network trace log to kernel log file

Stuart Browne — Fri, 15 Jun 2007 16:35:09 GMT

iptables -nL --line

Look for lines that have 'LOG' int he 2nd column, and 'BANDWIDTH_IN' or 'BANDWIDTH_OUT' on the right-hand-side.

Starting from the bottm, use:

iptables -D

to remove then.

If you want to leave the rules there, but only have them not trigger when the user is using 'eth0', then use:

iptables -R -i !eth0 -j LOG ........

(where ... makes up the rest of the rule (-s, -d, -p etc.)).

Once complete, save the rules. On a RH or SuSE system, use 'service iptables save'.

Re: network trace log to kernel log file

Tammy Liang — Mon, 18 Jun 2007 09:19:41 GMT

Thanks for the help... I see the iptables firewall rules and will disable them.

Thanks again.

Tammy

Re: network trace log to kernel log file

Tammy Liang — Mon, 18 Jun 2007 13:21:16 GMT

I stoped the iptables service. It stop the logging to dmesg.log file.