2 Octoprint instance with same address

[Sebastien_Carriere]

What is the problem?

Hello everybody.
I have two printers connected to octoprint. Locally, I can access them by myIP:5000 and myIP:5001.
It works properly.
From outside, the local network is accessible via a vpn and only port 80 is opened. It's a compagny VPN and i can not have more port opened.

My question is, can y have two address myIP\octopi and myIP\octopi2 and redirect port to access the two instances ?

Thank you very much

What did you already try to solve it?

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Have you tried running in safe mode?

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Did running in safe mode solve the problem?

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Systeminfo Bundle

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Additional information about your setup

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[planetar]

Hello Sebastien,

I cannot figure out your actual setup from what you describe. But as you mention "outside" the guide to remote access to OctoPrint may help.

Access your OctoPrint remotely

I´ll tell a little bit more about my VPN setup. At home I´ve kept the service provider router and installed my own behind it, creating a DMZ but I won´t give details on this, just the VPN that should be easier to configure. My router is an Asus that I´ve bought 2 years ago. I like their routers, because has a good performance and has a lot of features. I won´t talk about other features. I believe that every recent Asus routers includes VPN server and client, even the simpler ones. I´ve installe…

Searching the forum on remote access will result in many more threads if you need more info.

[Sebastien_Carriere]

Ok,
The VPN only accept port 80 as input.
So i can access octoprint only with routerIP:80.
The router is a littlebit old and redirect only port over ip ex:
routerIP:80 to localIP:80

Thats why I want to redirect inside the octoprint webserver via address.

Thanks

[Charlie_Powell]

You'll need to setup a reverse proxy on the server you have OctoPrint on, which will run on port 80, to then proxy /octopi and /octopi2 to their respective locations.

The OctoPi image includes Haproxy, with the config I've linked below. It configures / to go to OctoPrint, and /webcam/ to pass through to the webcam server. It should give you an idea of how it works. Proxy configuration is not easy, as it can look like another language at some points...

guysoft/OctoPi/blob/f5ed20c69bcfbb0d0d4ed244a2af5c9be7ce632f/src/modules/octopi/filesystem/root/etc/haproxy/haproxy.1.x.cfg

There's more examples available here, and some more details of what OctoPrint needs to work properly through a proxy. The X-Script-Name header is important.

Reverse proxy configuration examples

If you want to run OctoPrint behind a reverse proxy such as Nginx, HAProxy or Apache's mod_proxy you can find some configuration examples here. Nginx For Nginx the basic forwarding configuration is something like this: worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; map $http_upgrade…

[planetar]

I never researched it as I have no need from it, just the logic:

a passive approach (i.e.: the browser 'outside' determines which instance to access by calling myIPv4/somePath) most likely will not work unless you setup some ingenious reverse proxy.

An active approach may work like this: you have 2 different accounts at something like AstroPrint. Each individual OctoPrint connects to one of the accounts. As the connection is initiated by the OctoPrint instances the router will figure out the NAT stuff, browser goes to $(AstroPrint/thisOrThatAccount)

I take it you are aware that exposing an OctoPrint instance to the net w/o some reliable authentication in front is generally considered unwise. A 3D printer is a machine capable of starting a fire and kids do strange things for lulz.

[TTalkington]

@Sebastien_Carriere

The router is a littlebit old and redirect only port over ip ex:
routerIP:80 to localIP:80

I just want to point out that you are describing port forwarding, which is not the same as VPN. Port forwarding OctoPrint like that is highly discouraged.

If you really do mean VPN and it's limited to a single port for some reason, keep in mind that your webcam streams (if you have any) will also need to be setup similar to how Charlie has described because they will need to be accessible from the client to be visible too.

[Sebastien_Carriere]

Ok, i found an exemple with haproxy and it works fine.