I`m using a spa3102 with asterisk for an incomming line with the lastest firmware. The problem is that I have international calls (a lot) in this line, but in the PBX are not registers of these calls. I think the attack is over the spa3102. I have this device with public IP but the firewall is blocking the 5060and5061 UDP and 80and443 TCP, the device has not ssh or telnet. Is possible that the attack is RTP only???
Thanks in advance