Description This article describes the reason why SIP calls are
disconnected within 30 seconds after being answered Scope FortiGate.
Solution SIP calls getting disconnected within 30 seconds after being
answered is a symptom that the 3-way handshake ...
Description This article describes how to successfully establish a
VoWIFI call (WIFI Calling Service). Scope FortiGate. Solution For a
mobile phone to use the VoWIFI (mobile operator WIFI Calling Service)
steps 1 to 3 need to occur successfully: Step...
Description This article describes a solution for a situation where a
SIP call remains active after remote party call termination. Scope SIP
phones connected behind FortiGate, registering on an external PBX/VoIP
provider and with no SIP inspection on...
Description This article describes a way to assess if internal devices
are generating Middlebox Reflection Attacks using the TCP SYN flag with
a GET Payload as a strategy. Scope All FortiGate devices. Solution
Fortinet's Fortiguard web site provides ...
Description This article describes the steps needed to confirm whether
or not SIP traffic is being inspected by FortiGate. Scope VoIP traffic
over FortiGate. Solution In a FortiGate CLI window, run the following
commands to get a list of all existing...