Install certbot in server
$ sudo apt update
$ sudo apt install certbot
Run Certbot to generate Let’s Encrypt certificate
$ sudo certbot certonly --standalone --preferred-challenges http -d example.com
Get cert.pem, chain.pem, fullchain.pem, privekey.pem
vim /../../example.com/privatekey.pem
vim /../../example.com/cert.pem
vim /../../example.com/fullChain.pem
Go to EMQX Dashboard then go to listener (http://example.com:18083/#/listener)
- Click name with type is WSS
- Scroll to SSL Settings
- Change Cert, Key, CA Cert them click button update
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