Cannot Access Server from Home Network, but Cellular Works

[lakinreid]

Hey all, 

I've ran into the weirdest issue after setting up my Jellyfin server for the first time. I followed the Windows setup and network pages from Jellyfin to the T, and have my DuckDNS and Caddy proxy all set up. Everything works as it should, except I cannot connect to my server on any device which is connected to my home wifi. I can connect fine from Chrome on the PC which the Jellyfin server is  being hosted on, but my other PC and both phones in the house refuse to connect when the wifi is on. I get "Server Offline?" and error code: NSURLErrorDomain when I pull up the app. The other odd thing is, if I turn my wifi off and utilize the cellular network, it will load my movies and shows up with no issues. 

Some thoughts for yall:

Do I need to add IP addresses to the "Lan Networks" or "Known Proxies" fields within the Networking tab in Jellyfin? At the moment they are blank. 

Could this be a firewall issue of some sort?

Hoping someone can point me in the right direction, as I can't seem to find people who are having the same issue as I! Thanks in advance for reading!

[TheDreadPirate]

What kind of router do you have?

Can you share screenshots of Dashboard > Networking?

[lakinreid]

What kind of router do you have?

Can you share screenshots of Dashboard > Networking?

Hey sorry for the delay, and also for the duplicate thread! Thought I deleted this one haha. But anyway thank you so much for your help thus far! 

Tried finding loopback settings for the router, no luck with that. My router is one I was given from Spectrum (so that may part of the issue. probably should just go buy my own) with a model # of SAC2V2S. It has the lovely feature of only being able to edit its' settings from a phone app... Yet another reason I should go buy a different one lol. 

And I'll include screenshots of my Jellyfin network page to this reply also. 

I saw a few threads talking about creating a separate domain to login to from when I'm on my LAN, what are your thoughts on that? Or is the best course of action to go get a router which supports loopback, if mine indeed cannot do that?

Again, I appreciate all your help!

[TheDreadPirate]

From what I am reading, your router/ISP likely prevents NAT loopback but there are manual ways of getting around that as outlined in this reddit thread.

https://www.reddit.com/r/homelab/comment...back_so_i/

You are essentially creating a manual DNS entry for your DuckDNS domain on your router that will resolve to your 192.168.X.X address. When you leave your house and disconnect from your home router it will then resolve to your public address.

[lakinreid]

From what I am reading, your router/ISP likely prevents NAT loopback but there are manual ways of getting around that as outlined in this reddit thread.

https://www.reddit.com/r/homelab/comment...back_so_i/

You are essentially creating a manual DNS entry for your DuckDNS domain on your router that will resolve to your 192.168.X.X address.  When you leave your house and disconnect from your home router it will then resolve to your public address.

Hell yeah, I’ll give that a shot. And again, I’m very new to networking and whatnot. So just to be clear, I’ll go and create another site with DuckDNS. Though instead of that site directing traffic to my reverse proxy, it would just direct it to my local IP address?

[TheDreadPirate]

So what you're doing is making a DNS record on your router that points your domain to your jellyfin server and this is done on your router's interface. So that it only works when at home.  Once you leave your house it will use your public IP.

[lakinreid]

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So what you're doing is making a DNS record on your router that points your domain to your jellyfin server and this is done on your router's interface. So that it only works when at home.  Once you leave your house it will use your public IP.

So does my Spectrum app have limited DNS editing ability? I’m attaching pics of the only DNS menus I see. If I am on the right page, would do I enter? I guess I’m not sure even sure what type of value the prompt is looking for.

[TheDreadPirate]

Is the app the only way to interact with the router? Do they not allow you to access the router's admin panel from a web browser?

[lakinreid]

Is the app the only way to interact with the router?  Do they not allow you to access the router's admin panel from a web browser?

Indeed.. If I attempt to go to the default IP or whatever in the browser, it just pops up a page with a QR code to go download the phone app.. 😭 I think I’ll just have to go give spectrum back their poopy router and get my own! haha

[TheDreadPirate]

Is the app the only way to interact with the router?  Do they not allow you to access the router's admin panel from a web browser?

I think I’ll just have to go give spectrum back their poopy router and get my own! haha

This is the way.  Buy your own modem and router.  Look into getting a router that is compatible with FOSS router firmware like OpenWRT or FreshTomato.  You don't have to, but most FOSS router firmware unlocks a lot of options that were hidden.

FreshTomato breathed new life into my older Netgear R7000.