A port is open Telnet test server, don't need to enter account and password, Telnet connection can, if you open, the return value of 0,; If you don't open, the return value 1, a great god, please give a script, grateful grateful!

CodePudding user response:

Winsock control is directly connected to the IP, port, can connection is open, can't connection is not open,
And Telnet it doesn't matter, unless you make sure that port Telnet service