After the update_11-v5.3 installation, port 5090/UDP is blocked by the firewall. As Remote phones use this port to register, it's expected that they will not be able to register. To solve this, please choose one of the following options:
- If the remote phone is behind an internet access with a static IP address, a firewall rule must be configured in order to accept incoming traffic from that IP to destination port 5090/UDP (please check Figure 17.2).
- If the remote phone is behind an internet access with a dynamic IP address, when possible, a VPN tunnel should be used. If the use of a VPN tunnel is not possible you will need to add a firewall rule in order to accept incoming traffic to port 5090/UDP from any location. In this case, you should accept only the provider's network from where the remote phone is registering (please check Figure 17.3).
IPBRICK
