Any way to see the IP address of a Brute Force Attacker?

Is there any way to see the IP address of a Brute Force Attacker within the FreePBX machine? I have fail2ban on but I am not seeing any IP addresses.

Depending on your version of Asterisk, you can turn on security in your log files and add the necessary regex lines to fail2 ban, a good tutorial at:-

http://sourceforge.net/p/raspbx/discussion/tutorials/thread/6288a838/