Telnet tutorial

What is Telnet ?
TelNet or TELecommunication NETwork is a network protocol which is used to connect two computers . It is Based on Client-Sever relationship that means there must be a server to connect to for the client . also it is available with every OS .

If it still seems confusing here is a quick example

Open Command prompt (win key+r ->cmd -> enter) or bash shell (linux users)
Type telnet 80
you should see connecting to -> then a blank screen
what to do next
type GET / HTTP/1.1
But i can't see what i am typing --- well it happens for windows users -- you can get a third party telnet client like putty

you must be seeing lot of rubbish on the screen -> this is actually to source code of index page of

What actually has happened is
Step 1:- telnet 80
you connected to on port 80 or you can say you connected to google's webserver/computer(webserver is also a computer) on port 80

Step 2:- GET / HTTP/1.1
you requested the foreign computer/ to send you "/" or home page through Hypertext Transfer Protocol (HTTP) version 1.1.

Step:- Google sends the home page or index page but since command prompt cannot parse it it displayes it as such .

Your web-browser does the same but it has the ability to parse html formatting so it displayes a beutifully parsed page

Now what else :-
You can try telneting to differnet ports like
port 7 -> echo port -> displayes whatever you typed in
port 23 -> default telnet sever port -> gives you remote command line access to machine
port 25 -> SMTP port -> helps you send mails
port 80 ,443 -> HTTP and HTTPS ports
etc. there are hell lot of other important ones (you can telnet to any port if it is open or is not blocked by firewall) where you can telnet but i am leaving the list

Ok I know ports to telnet but where can i telnet on -> i mean computer

here is a long list from which shows different places where you can telnet alog with port nos

for example for " telnet 666"

Fun Stuff!


Star Wars asciimation -- telnet:// (port 23)
Marvin (eliza-like bot) -- telnet://
The Bofh Excuse Server -- telnet://


Hytelnet is an old (an now unmaintained) directory:


For the moment, we will not attempt to give a complete listing of Mud's or Moo's. Instead, check out:

Some muds that have been submitted by readers: -- port 4000 -- port 4300 -- port 2000


Go forth and gather knowledge. We present libraries:
(Some addresses are followed by a login and password)

CANADA guest guest guest guest guest %guest guest guest guest guest guest guest guest ENTER(key) guest guest guest

FINLAND visitor



UNITED STATES (Library of Congress) visitor guest visitor bbs bcn freeport guest visitor guest visitor guest guest visitor guest guest ENTER(key) guest guest visitor visitor visitor
heartland.bradley.edu1 bbguest ENTER(key) newuser visitor visitor guest guest opt. #2 visitor visitor visitor visitor visitor guest guest visitor guest visitor VISITOR visitor visitor visitor visitor visitor visitor bbs guest visitor visitor visitor visitor visitor visitor visitor guest guest guest


Here are a few talkers to get you started chatting:

Abbes ===
Blackhawk ===
Elgin ===
Enchanted Village ===
Eye of the World ===
Promised Land, The ===
Seventh Heaven ===
SpauMUSH ===
Speedway Talker ===
Utopia Parkway ===

Telnet is that all Huh??

Not telnet also have a no of syntaxes
type telnet /? in the command prompt to get the list some important ones are
-a to perform autologin with current username
-f to log your telnet session to a file
-t to determine the type of terminal to be used (vt100 ,vtnt ,vt52 ,ansii)

in the command prompt :

telnet [host( r ip address][port no.][-a][-f log.txt][-t vt100]

substitute them with appropriate values without the brackets

for eg :- telnet 80 -f log.txt
it connects on port 80 and logs the activity on log.txt file

Other info:
telnet is called queen of hacker commands
you can only telnet to open ports so first scan a machine for open ports with nmap if you want to connect to it
telnet basically reflets what kind of service is running on a particular port so it is very useful tool for banner grabbing

Article written by AUTHOR_NAME