Have a look at /etc/syslog.conf
# 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!
Mine logs to /var/log/info
Comment out the /dev/console line as above
Add a line for /var/log/info
Change the line for /var/log/messages to include kern.!=info as above
Change your iptables script -j LOG rules eg
iptables -A INPUT -p tcp --dport 10000 -j LOG --log-prefix "Webmin " --log-level 6
to make sure messagaes are logged at level 6 = info.
Restart syslog, 'service syslog restart'