Calls being dropped

[JohnS_3CX]

Ok then that seems like a an attacker spoofing the user agent. Leave it blocked and it will stop them.

As for the DECT phone, please try to upgrade the base's firmware and then the handset as per the guide I posted above (it has a Yealink firmware landing page linked specifically for 3CX), and reset/provision it behind the SBC rather than STUN

 

[positive3]

Ok then that seems like a an attacker spoofing the user agent. Leave it blocked and it will stop them.

As for the DECT phone, please try to upgrade the base's firmware and then the handset as per the guide I posted above (it has a Yealink firmware landing page linked specifically for 3CX), and reset/provision it behind the SBC rather than STUN

I have blocked it until 2039! I will probably put it all through the SBC later in the week.

 

[AWS2P]

Don't forget to delete mac adress on RPS before switching STUN to SBC mode