If you do do this, you will probably want to log to another machine that writes them out disk.
The logs normally written by m0nowall are held in memory, and if you log everything, they will scroll so fast there may not be anything worth looking at when you really need them.
Thanks for the response.
You mean another machine running syslog server, am I right? Even then, I think, m0n0wall log only failed firewall rules and not the allowed ones. I am trying to log all successful connections as well.