FIXED: One-way audio when enabling DrayTek DDOS protection

Issue / Fault definition

You get one-way audio when enabling DrayTek DDOS protection on VOIP phones

Impact

All phones behind the DrayTek Router/Firewall are affected by this issue

Known/associated error messages

N/A

Known Fixes / Solutions

To fix this issue, untick Enable port scan detection.

This fix is accredited to Jordan Dunwell

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