I have a problem with Security

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

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

  • If you see unauthorized calls from your connected PBX like FreePBX, Elastix:

1. Make sure you use strong passwords for authentication 2. Check if there are not unauthorized connections in PBX 3. Some cases indicated problems which are reviewed here and here.

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