Summary
The remote system is running a server that speaks the Inter-Asterisk eXchange Protocol.
Description :
The Inter-Asterisk eXchange protocol (IAX2) is used by the Asterisk PBX Server and other IP Telephony clients/servers to enable voice communication between them.
Solution
If possible, filter incoming connections to the port so that it is used by trusted sources only.
References
Updated on 2015-03-25
