Ok well telnet lets you talk to ANYTHING. Its a dumb socket client, which means it lets you send text to a port. Telnet is basically a dumb terminal with no features what so ever, its what you type that makes it do stuff.
Here is how it works, when programmers make a webserver that web server has to talk to a browser now a programmer is not going to make that hard so the conversation is normally in english.
Example an FTP conversation
CutefTP: Open 182.232.323.2 21
Server: 200, OK Hi Please send user
CuteFTP: user Xtreame
Server: 200, OK send pass
CuterFTP: pass IsYourDaddy
Server: 200, OK, Logged in
Etc so if you know the commands you can act like Cuteftp or IE or any application so long as you know the protocol for the conversation.
So in telnet for example
Try Telnet server port
example Telnet
www.somedomain.com 21
Port 21 is the standard port for an FTP server, so you could try the conversation via telnet. It makes good practise since FTP is a simple conversation to follow.
Hacking using Telenet is one of the Master Hackers Arts.
Because Telnet hacking requires you to know how to do the conversation of the service you are going to crack, overflow or otherwise mess with.
My um reputation for being able to hack just about enything using Notepad and or Telnet is not really so much about telnet or notepad.
Its because I know the systems I am attacking very well, and I undertand networking and programming well.
I think the best way to be good at hacking or in my case securing things, is to know them well to be an expert in the system you wish to attack.
Hacking is really about loving the system undertanding how it works, AND THEN MAKING IT WORK AGAINST ITSELF
Xtreame