How to log dropped packet ?

How to log dropped packet ?

[Jerry Kim]

Hi all.

I hope to know how to log dropped/accepted packets.
For example,

iptables -A INPUT -i eth0 -p tcp -d 10.10.10.1 --dport 22 -j ACCEPT

How can I log it ?
I don't understand how '-j LOG' target operate.

Help.

Re: How to log dropped packet ?

[Ray Leach]

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On Wed, 2003-07-16 at 14:14, Jerry Kim wrote:
> Hi all.
> 
> I hope to know how to log dropped/accepted packets.
> For example,
> 
Exactly the same except put -j LOG --log-prefix "Accept input eth0"
instead of -j ACCEPT.
Oh, and the log rule must be before the accept/drop rule.

> iptables -A INPUT -i eth0 -p tcp -d 10.10.10.1 --dport 22 -j ACCEPT
> 
> How can I log it ?
> I don't understand how '-j LOG' target operate.
> 
> Help.
> 
-- 
--
Raymond Leach <raymondl@knowledgefactory.co.za>
Network Support Specialist
http://www.knowledgefactory.co.za
"lynx -source http://www.rchq.co.za/raymondl.asc | gpg --import"
Key fingerprint = 7209 A695 9EE0 E971 A9AD  00EE 8757 EE47 F06F FB28
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Re: How to log dropped packet ?

[Julien Didron]

Hi all,

I apologize for being a little OT, but has anybody tried to log to another 
file than /var/log/syslog when using -j log ? if so, thanks for sharing the 
experience ;o)

--
Open WebMail Project (http://openwebmail.org)


---------- Original Message -----------
From: Ray Leach <raymondl@knowledgefactory.co.za>
To: Netfilter Mailing List <netfilter@lists.netfilter.org>
Sent: 16 Jul 2003 14:49:47 +0200
Subject: Re: How to log dropped packet ?

> On Wed, 2003-07-16 at 14:14, Jerry Kim wrote:
> > Hi all.
> > 
> > I hope to know how to log dropped/accepted packets.
> > For example,
> > 
> Exactly the same except put -j LOG --log-prefix "Accept input eth0"
> instead of -j ACCEPT.
> Oh, and the log rule must be before the accept/drop rule.
> 
> > iptables -A INPUT -i eth0 -p tcp -d 10.10.10.1 --dport 22 -j ACCEPT
> > 
> > How can I log it ?
> > I don't understand how '-j LOG' target operate.
> > 
> > Help.
> > 
> -- 
> --
> Raymond Leach <raymondl@knowledgefactory.co.za>
> Network Support Specialist
> http://www.knowledgefactory.co.za
> "lynx -source http://www.rchq.co.za/raymondl.asc | gpg --import"
> Key fingerprint = 7209 A695 9EE0 E971 A9AD  00EE 8757 EE47 F06F FB28
> --
------- End of Original Message -------

Re: How to log dropped packet ?

[Ramin Dousti]

man syslog.conf
man syslogd
also -j LOG --log-level info/alert/debug...


On Wed, Jul 16, 2003 at 01:22:19PM +0000, Julien Didron wrote:

> Hi all,
> 
> I apologize for being a little OT, but has anybody tried to log to another 
> file than /var/log/syslog when using -j log ? if so, thanks for sharing the 
> experience ;o)

Re: How to log dropped packet ?

[Sven Schuster]

Hi,

you could take a look at the ULOG target. You'll need the additional 
ulogd-package
from http://gnumonks.org/gnumonks/projects . With this you can log 
pakets to plain
text files, databases, etc. More information is in the iptables man-Page 
and probably
in the ulogd package itself, I haven't used it for some time.

Hope this helps

Sven


Julien Didron wrote:

>Hi all,
>
>I apologize for being a little OT, but has anybody tried to log to another 
>file than /var/log/syslog when using -j log ? if so, thanks for sharing the 
>experience ;o)
>
>--
>Open WebMail Project (http://openwebmail.org)
>
>  
>