What is SSL?
SSL protects the link between a visitor and a website. It scrambles the data, so nobody in the middle can read it. A website with SSL starts with https:// and shows a padlock. The newer form of SSL is called TLS. Most people still say SSL.
An SSL certificate is a small file that proves a website is who it says it is. It is like an ID card for your site. Visitors use SSL without doing anything special.
What is SSH?
SSH stands for Secure Shell. It lets you control a server by typing commands from your own computer, safely. Think of it as a private telephone line to the server. People use SSH to manage files, install software and fix problems.
You log in with a user name and a password, or with a key. A key is a long secret file that works like a special door key.
Side by side
| Point | SSL | SSH |
|---|---|---|
| Main job | Protects visitors on a website | Lets you manage a server |
| Who uses it | Every visitor, automatically | Site owners and admins |
| How you see it | Padlock and https | A command window |
| Needs a certificate | Yes | No, uses passwords or keys |
| Usual port | 443 | 22 |
A port is like a numbered door on a server. Each service uses its own door.
Which one do you need?
- If you have a website, you need SSL. It protects your visitors and helps trust.
- If you manage a server or run commands, you need SSH.
- Most site owners need both.
Quick recap
- SSL protects the connection between visitors and your website.
- SSH is a safe way for you to control a server.
- SSL shows as a padlock. SSH is a command window.
- They do different jobs, and many sites use both.