Plex unreachable with apps behind reverse proxy

Plex Media Server Desktops & Laptops
1

Hello,

I have the following configurations =>

  1. I have my own domain with a let’s encrypt certificate.
  2. I then have a reverse proxy set up in kerio control that points to my local server ip with port 32400
  3. In network settings I have “https://domain.com” in costum server url
  4. I have a firewall rule that only certain ip’s can connect to the reverse proxy (girlfriends house
    external ip, vacantion house …)
  5. My reverse proxy only accepts https traffic

Now the problem is when I’m not at home I can connect to the plex server fine with the costum url and the connection will be secure (green lock) with my laptop using a browser.

But when I’m using an app like kodi or the ps4 app (tested those apps) I have the following error =>

ServerName is offline or unreachable
We tried to connect to “local ip”,“domain.com”

Is this because plex is using another ip for trying to connect to that domain. What ip’s do I need to whitelist? Or is this another problem.

Setting the reverse proxy for plex open for everyone is not an option because my father want’s to limit the traffic going to the reverse proxy.

2

I would take a guess that your PC can connect because you installed the SSL certificate that allows the HTTPS connection to your reverse proxy server. Other non Microsoft Windows apps don’t have that certificate of your reverse proxy and unable to connect via HTTPS.

Understand the ideology behind trying to mask your web server but in this case what are you gaining? You have your firewall which limits remote access, plus passwords within Plex. If you wanted that extra level, then go with a VPN server at your home network location and VPN client routers at remote locations.

3

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