Problem with port forwarding router Upvel UR-319BN?

Question

Network administration

Hello. Please tell me what is the reason. Launched the Apache2 server on the computer. I assigned port 89 to it. From the local network at 192.168.10.2:89 everything works fine. I forwarded port 89 to the server address. But you can't get to the server from the external network. The page takes a long time to load and the result is zero. I will add that you can access the router itself on port 80 from the outside without any problems. Help me please.

Answer 1

Page 44-45 of the user manual downloads.upvel.ru/UR-319BN/manual/319%20Ru%20UM.pdf. Either one (group) of ports - p.44, or all incoming to one internal host (DMZ) - p.45.