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T20P Incoming Call From Fake Extension
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wiwebtech Offline
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Post: #1
T20P Incoming Call From Fake Extension
Firmware Version: 9.72.0.80
Hardware Version: 7.0.1.62

Dedicated IP assigned by the router. Phone is attached to Grandstream UCM6102. Everything works fine as far as incoming and outgoing calls. There are 6 extensions, namely 101,102,103,104,105,106.

Lately, we have been receiving incoming calls from extension 1000 and 1001. Calls ALWAYS ring on extension 103. I understand that this happening because of port scanning by unknown "evil doers". How do we stop this from happening. We setup the whole system ourselves.

I have attached the Pcap file of this event, when T20P at extension 103 is ringing and shows 1000 or 1001 as incoming caller id.


Attached File(s)
.pcap  9.72.0.80_15_8_33.pcap (Size: 59.05 KB / Downloads: 3)
01-09-2015 11:24 PM
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T20P Incoming Call From Fake Extension - wiwebtech - 01-09-2015 11:24 PM

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