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Ghost Calls from Port Scanning
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ctiefel Offline
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Ghost Calls from Port Scanning
We have large deployments of Yealink T20 phones where individual phones are running off of individual home networks. Lately we have been seeing a large increase of what we are calling "ghost calls". This seems to be the end result of hackers port scanning known VOIP ports. The caller ID will say "100" or "1000" and ring the phone constantly, usually at night, and when they pick it up there is no one there.

Is there a way in the Yealink phone, older firmware or newer firmware, to restrict incoming calls to only those coming from the SIP server?
11-08-2013 10:01 PM
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Ghost Calls from Port Scanning - ctiefel - 11-08-2013 10:01 PM
RE: Ghost Calls from Port Scanning - Fuur - 11-25-2014, 07:01 PM

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