[Freeswitch-users] Generate a custom log alert on failed SIP Registration

Hi Guys Wondering if it is possible, and if so how, to create a custom log ALERT entry on a failed SIP Registration? Basically I want to output an ALERT to the log file with “Auth Failed ${ip of register} I want to drop logging level down to Alert as this is going to be a high volume SBC, but I want to be able to use fail2ban to block on failed registers. Any help would be much appreciated. Regards