Telnet
How telnet works:
Step 1) Install Telnet Client and Telnet server at both client and server side
Step 2) Create a account (Username and password) in client side.
Step 3) Telnet client will send a request to Telnet Server.
Step 4) Telnet server will reply back with asking username and password.
Step 5) If accepted, Telnet Client will established a connection with client.
Step 6) Via virtual terminal, we have access to the client’s system.
This all happen when client initiates TCP 3 way-handshake to the server.
Let’s see how it does look like, we’ll use wireshark for instance.
TCP Handshake before Telent:
Telnet Server IP: 192.168.0.1
Telnet Client IP: 192.168.0.2
Telnet Server ask for login details to Telnet Client:
Telnet Client response with credentials:
UserID:
Password:
And Finally Session is closed:
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