Why does forwarded port not work from LAN?

Question

Computer networks

Hello, there is mikrotik, domain: domain.ru, how to configure it so that you can get to the server behind the router via domain.ru:81 both from the local area and via the Internet?
Router :
External : 1.1.1.1
Local : 192.168.1.1
Forwarded port 81 to the server
Server :
IP : 192.168.1.2
web port : 80
Task:
1) Being on external ip, suppose: 2.2.2.2 , referring to 1.1.1.1: 81 , the server should answer
2) Being on the local network at: 192.168.1.3 , referring to 1.1.1.1:81, the server should answer
That is, from the Internet I get to the server, but from the local network the domain does not go, how to configure it correctly?

Answer 1

There is a solution, but it is not convenient if there are many ports:

/ip firewall nat chain=dstnat action=netmap to-addresses=192.168.1.2 to-ports=80 protocol=tcp packet-mark=1

/ip firewall nat chain=srcnat action=src-nat to-addresses=192.168.1.1 packet-mark=1

/ip firewall mangle chain=prerouting action=mark-packet new-packet-mark=1 passthrough=yes protocol=tcp src-address=192.168.1.0/24 dst-address=1.1.1.1 dst-port=81

Description of these commands in the comment above

Answer 2

Hairpin NAT

Answer 3

As a workaround: write on the hosts of the local network in the hosts file the correspondence of domain.ru to the gray IP address of the server