I have a problem with Security

You see a lot if unknown calls in your statistics with unusual destinations and callerIDs.

• First of all check if Fail2Ban is installed

You should see such lines after issuing command iptables --list :

[root@kolmisoft]# iptables --list
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
DROP       all  --  XX.XX.XX.XX         anywhere            
fail2ban-SSH  tcp  --  anywhere             anywhere            tcp dpt:ssh 
fail2ban-ASTERISK  all  --  anywhere             anywhere            
DROP       all  --  XX.XX.XX.XX       anywhere            
DROP       all  --  XX.XX.XX.XX  anywhere      

Where XX.XX.XX.XX is some IP address