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[ELI5] What is a reverse proxy exactly and how do I use it to run several dockerized services on one machine? (self.selfhosted)

submitted 1 year ago* (last edited 1 year ago) by Solvena to c/selfhosted

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So, I have some idea on what a reverse proxy does and will be using nginx (with the neat proxy manager UI) for my setup.

However, I'm not completely clear what exactly I want it to do and how I cn use it to run different services on one machine. I'm especially unclear on the ports configuration .... tutorials will say things like "change the listening port to xxx for that service and to port yyy for the other service"

How does this work, which ports can I use and how do I need to configure the respective services?

EDIT: thanks everybody, your replies did help me a lot! I have my basic setup now up and running using portainer + nginx + fail2ban.

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[–] hungover_pilot 1 points 1 year ago

For future reading this "multiplexing" is called SNI inspection/routing and it can only be used when TLS/SSL is in use.