So, what if we played a bit ? We will speak some network protocols by hand through a socket (netcat or telnet). Ready ?
SMTP
Gogo SMTP : Sending an email like a tru3 h4ck4r. nc monserveursmtpfavoris.com 25
EHLO myfavoriteserver.com
MAIL FROM: mylogin@myfavoriteserver.com
RCPT TO: myrecipient@hissmtpserver.com
DATA
One supa mail
.
Ok you've just sent a slick mail by hand. Now that you are convinced that SMTP is easy, what about IMAP ?
IMAP
nc myfavoriteserver.com 143
. login myuser mypass
. status INBOX (messages)
. status INBOX (unseen)
. fetch myfavoritenumber full
. logout
Once again it was easy but less interesting…
IRC
Next : IRC ? ok ! nc myfavoriteirc.com 6667
user mynick myhost myfavoriteirc.com :myident
nick mynick
privmsg myfriend : Telnet is so fresh !
pong myfavoriteirc.com
So… not my bad for this timee, no ?
TLS
A small hint : if you want to do the same thing but with a bit more privacy thanks to ssl/tls : replace netcat with openssl : openssl s_client -connect host:port Maybe we will learn more protocols later