Mikrotik Port Service TELNET 23 - MikroTik Script RouterOS
It has almost the same function as ssh, but it has some limitations and a low level of security. Usually used for remote routers in the console. MikroTik telnet service uses port 23. This TELNET port is often attacked using BRUTE FORCE, you can change the port or disable it when not in use. is often attacked using BRUTE FORCE, you can change the port or disable it when not in use.
# TELNET Port Enable
/ip service set ftp port=23 address=0.0.0.0/0 disabled=no
# TELNET Port Disable
/ip service set ftp port=23 address=0.0.0.0/0 disabled=yes
Credit: mikrotik.co.id