I vaguely remember once having set up a system so that the network traffic was getting dumped into /var/log/messages.
I don't know how I got it set up that way, but I think I eventually got it to stop with help from man pages for
It might also have something to do with iptables.
One thing to look at is the command:
I do not remember the specifics, but I think it is possible to put specific log traffic into a different file than messages.
As an example, I modified my /etc/syslog.conf so that gconfd "spam" goes to /var/log/user instead of /var/log/messages
# Log all kernel messages to the console.
# Logging much else clutters up the screen.
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
# The authpriv file has restricted access.
# Log all the mail messages in one place.
# Log cron stuff
# Everybody gets emergency messages
# Save news errors of level crit and higher in a special file.
# Save boot messages also to boot.log
# gconfd ?
Maybe there is a way to redirect IP traffic logs too.
Or maybe there is a way to avoid logging it.
On my system which doesn't have any custom iptables, it doesn't log those kinds of messages.