I am currently using Asterisk 11.8.1 with Centos 5.9
currently is not live yet, but I getting hacker trying their luck to access with the following
NOTICE: chan_sip.c:11452 copy_header: No field 'Call-ID' present to copy
Registration from '"7581" <sip::5060>' failed for '[url removed, login to view]'
I have installed fail2ban but i seems to configure them wrongly and therefore
looking for an expert to fix my fail2ban config file to block any attempt.