View source for I see a lot of unknown calls in statistics

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

* First of all check if [[Fail2Ban_installation| 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
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* If you see unauthorized calls from your connected PBX like FreePBX, Elastix:

1. Make sure you use strong passwords for authentication<br>
2. Check if there are unauthorized connections in PBX<br>
3. [[How to block someone's IP| Block]] all unknown IPs from your system<br>
4. In some cases external PBX'es were hacked, related problems are reviewed [http://nerdvittles.com/?p=737 here],  [http://www2.elastix.org/en/component/kunena/116-security/73040-how-to-change-the-default-asteriskuser-password.html here] and [http://blogtech.oc9.com/index.php?option=com_content&view=article&catid=18:securite--security&id=263:security2011-04&Itemid=6 here].<br>
5. Setup a secure VPN connection from your PBX to MOR.