There are various ways of obtaining remote access, we are going to look at each in turn, and decide when we would choose to use them:
- Telnet: A protocol that was first used in 1973 to run remote commands on devices, such as routers. Unfortunately the session is in clear text and therefore not secure. If you want to know whether port 25 is opening on a mail server called Mail1, you could run telnet Mail1 25. It is no longer used as it is unsecure but may be tested.
- Secure Shell (SSH): Invented in 1991 to replace Telnet so that it could run commands securely, it is commonly used when you want to perform remote access onto routers.
- Remote Desktop Protocol (RDP): A Microsoft product that allows you to run a secure remote ...