Local Server Can't be Accessed Because of Port

Hello, can somebody help me with my local server problem.
So I have local server for example: www.abc.com.
My www.abc.com can’t be accessed because i put the port to 81 at my server.
I have another server at port 80 and that server can be accessed from anywhere with webproxy setup in mikrotik.
So, I want to ask how to setup my www.abc.com so that server can be accessed from anywhere.

  1. network diagram please labelled
  2. /export hide-sensitive file=anynameyouwish

Thank you Sir for your reply
I already find the solution Sir
Thank you~

And what was the solution ?

Sorry for my late reply sir
I only need to add new firewall nat rule with port 81 and redirect it to my web proxy server :smiley: :smiley: