Problem accessing web server

I am experiencing problems accesing a web server.
Every time I try to access my web server from Internet, I get mikrotik router login screen.
I have changed web server port and forwarded traffic accordingly whith same result.
Filter rule for port 8291 has been disabled.
Port 80 shows always open, even if no explicitly indicated.

I am using RB951G - 2HnD
OS: 6.6

I am know exhausted. Help will be appreciated.
Thanks.