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Special Forums IP Networking To get tcp header alone in log Post 302507559 by linuxadmin on Thursday 24th of March 2011 07:42:33 AM
Old 03-24-2011
To get tcp header alone in log

To get tcp header alone in log
----------------------------------------------------------------------------------------[
]# vi /etc/sysconfig/iptables
---added the following 2 lines..
-A INPUT -j LOG --log-ip-options
-A INPUT -j LOG --log-tcp-options

]# vi /etc/syslog.conf
---added the following 1 line
kern.warning /var/log/iptables.log # for getting IPTables' log in iptables.log file

]# /etc/init.d/syslog restart

]# service iptables restart

]# tail -f /var/log/iptables.log

# du -sh /var/log/iptables.log
Here is the problem...

As i did it in a server , the file size is keep on increasing like anything..

----------------------------------------it's working fine.------------------------------------------------]

But I just need TCP header alone . Not all the protocols...

Is there any way..??

Here i used iptables... to get Log..

You can suggest me any other way..

Anything acceptable. My actual need is to know who are all connecting my server using TCP..

.
.

Last edited by linuxadmin; 03-24-2011 at 08:54 AM.. Reason: changing the view.
 

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IPTABLES-SAVE(8)                                                  iptables 1.6.1                                                  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
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