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Ghost Calls from Port Scanning
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Abe1048 Offline
We Love Yealink!!!

Posts: 87
Joined: Aug 2013
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Post: #23
RE: Ghost Calls from Port Scanning
(12-04-2014 07:34 AM)bnelson Wrote:  Our service supports using TCP as the SIP transport. Adds some latency, but it can be useful for situations like this, better battery life on mobile, bypassing SIP-ALG on verizon 4G hotspots, etc...

It does use more resources on the server however.

Edit: I just tested the "Allow IP Call" = No and I am no longer able to make an unsolicited call to the extension.

Looks like newer firmware versions may have fixed this since I last tried. I will test more, and update here with results. Looks like the sip trust control is not required to kill generic sip vicious scanner calls. A more advanced scann attack might still be able to gather the extension, but I'll cross that bridge when it happens...

Hi all,

We have found that using a router with the tomato firmware fixes all theese issues.

All the best,
12-26-2014 05:02 AM
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Messages In This Thread
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
RE: Ghost Calls from Port Scanning - Abe1048 - 12-26-2014 05:02 AM

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