Re: netfilter logging

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Jimmy wrote:

Hello,

I have just started to log my iptables drops. As seen with this line in my
iptables-save output.

-A INPUT -j LOG --log-level 1
-A INPUT -j LOG --log-prefix "Dropped: "

What I would like to know is how I can get iptables to NOT log to console
only to the message logs. Currently it goes into /var/log/syslog

Here is my syslog configuration. I cant see whats wrong with it.

# /etc/syslog.conf
# For info about the format of this file, see "man syslog.conf"
# and /usr/doc/sysklogd/README.linux.  Note the '-' prefixing some
# of these entries;  this omits syncing the file after every logging.
# In the event of a crash, some log information might be lost, so
# if this is a concern to you then you might want to remove the '-'.
# Be advised this will cause a performation loss if you're using
# programs that do heavy logging.

# Uncomment this to see kernel messages on the console.
#kern.*                                                 /dev/console

# Log anything 'info' or higher, but lower than 'warn'.
# Exclude authpriv, cron, mail, and news.  These are logged elsewhere.
*.info;*.!warn;\
       authpriv.none;cron.none;mail.none;news.none     -/var/log/messages

# Log anything 'warn' or higher.
# Exclude authpriv, cron, mail, and news.  These are logged elsewhere.
*.warn;\
       authpriv.none;cron.none;mail.none;news.none     -/var/log/syslog

# Debugging information is logged here.
*.=debug                                                -/var/log/debug

# Private authentication message logging:
authpriv.*                                              -/var/log/secure

# Cron related logs:
cron.*                                                  -/var/log/cron

# Mail related logs:
mail.*                                                  -/var/log/maillog

# Emergency level messages go to all users:
*.emerg                                                 *

# This log is for news and uucp errors:
uucp,news.crit                                          -/var/log/spooler

# Uncomment these if you'd like INN to keep logs on everything.
# You won't need this if you don't run INN (the InterNetNews daemon).
#news.=crit                                     -/var/log/news/news.crit
#news.=err                                      -/var/log/news/news.err
#news.notice                                    -/var/log/news/news.notice


Any advice would be great.

Thanks

Hello,

Try the ULOG target [1] and the ulogd daemon [2].
That combination will allow you to log to a particular file.

[1] - http://iptables-tutorial.frozentux.net/iptables-tutorial.html
[2] - http://freshmeat.net/projects/ulogd/

regards,
Georgi Alexandrov


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