How I can configure for connect my pc into my lan to a web/ssh server into my lan but using my dyn domain?

Note: from last 10 years this was a normal operation with my old modem/router/adsl (Linksys wag200g).

TD-W8980

My actual set:

   forwarding:

      port 80 to my internal server ip 192.168.1.9, protocol any,  wan pppoe_8_35_0_d

      port ssh to my internal server ip 192.168.1.9, protocol any, wan pppoe_8_35_0_d

firewall ipv4 (ipv6 not used):

    deny policy

    lan host my-server, wan host any, direction out, protocol any, no schedule

    lan host my-server, wan host any, direction in, protocol any, no schedule

lan host:

   my-server

      ip address 192.168.1.8-192.168.1.10   (for future expansion, change the forrward address)

Using browser on my pc (firefox or palemoon), make into address bar the my dyn domain. After many time exit timeout connection.

Using tor browser, make into address bar the my dyn domain, work ok.

Ping my dyn domain work.

Using browser with internal lan ip address, work.

Why not work?

Is very important for me.