I would like to know all the things that can be done with telnet, currently i use it to determine if a remote machine is listening on some specific port like this telnet [machine] [port]. any ideas please
A:
FTP, HTTP I already tried. You can telnet to a web server to work with the headers themselves etc...
xtofl
2009-07-15 12:30:53
+2
A:
Look at telnet as basically opening a socket to another machine on a port.
You can log into another machine (not securely) using it. If you know the SMTP protocol, you can send mail with it. If you know how to formulate an HTTP request, you can even make HTTP requests with it and get back a HTTP response stream. It's a lovely tool.
Dave Markle
2009-07-15 12:32:46
If you're very, *very* patient and good at math, you could even SSH with it.
Williham Totland
2009-07-15 12:34:56
@Williham: L O L
Dave Markle
2009-07-15 12:44:45
+1
A:
It can be useful in debugging many application level protocols. For example:
% telnet stackoverflow.com http
HEAD / HTTP/1.1
Host: stackoverflow.com
returns the HTTP headers of stackoverflow.com front page.
Though netcat (man 1 nc) is a bit more versatile in these kinds of tasks.
laalto
2009-07-15 12:33:18
A:
You can interact with an SMTP server to send mail:
telnet somemailserver.somedomain.com 25
HELO somesender.somesenddomain.com
MAIL FROM: [email protected]
RECPT TO: [email protected]
DATA
Type message now.
.
Tony Miller
2009-07-15 12:34:09
A:
You can connect to your mail server and send an email using telnet.
Telnet to hostname on port 25
HELO your_domain_name or whatever
MAIL FROM:[email protected]
RCPT TO:them@someplace_else.com
DATA
hit ENTER QUIT
Jonathan
2009-07-15 12:34:23