Server Side
Telnet Server
make sure telnetd (tlntsvr.exe) is running, if not, start it from services.msc or “control panel“;
and make sure firewall is allowing Port:23 to pass through
netsh advfirewall firewall add rule name="allow2323in" dir=in localport=2323 protocol=TCP action=allow
Telnet administration tool
tlntadmn.exe config sec=-ntlm
so strange name of telnet administration tool.
Client Side
telnet 111.222.222.111 2323
>login: balabala
>password: balabala
>Done