Unable to open any incoming ports by configuring a virtual server. PC behind router is Win10-64 v2004. Have contacted the ISP and they claim to only block incoming port 25 - and all others are open. Internet browsing works without issues. There is an SSH server on a PC (192.168.1.100) attached (wired) to the router. The SSH server is configured to use port 222 - incoming and outgoing. The outgoing SSH client functions normally and I can access remote machines via the internet connection. Configuring a virtual server for 192.168.1.100 with both incoming and outgoing ports set to 222 does not result in an open incoming port being visible. Using https://canyouseeme.org/ to check open ports. Setting 192.168.1.100 as a DMZ and rebooting the router does not open any ports - including 222. When pinged from a remote machine, the WAN IP  address times out. Dynamic DNS (on the PC with the server) updates properly but the WAN:222 is not visible from the internet. However - enabling 'Remote Management' in router administration opens Port 443 and that port is visible using a port check tool. Disabling closes that port and it is then no longer visible. Help configuring the router would be appreciated.