@Virgo Thx for the link. I had already done this procedure, but the PBX server continues to receive connection attempts on port 5060 even though I restricted it to the trunk provider's IP address. My...

Hi there, using an ER6020 to provide Internet access, I have to filter a port (5060) AND an IP address (the VoIP provider), because we are experiencing a very important lot of connection attempts on...