Hello, this is the first time I’m trying to self host Discourse. I followed the official GitHub Installation guide by running wget -qO- https://raw.githubusercontent.com/discourse/discourse_docker/main/install-discourse | sudo bash. Everything worked well until it came to connecting to the subdomain. After completing verification I keep getting the same errors “Port 443 of this computer does not appear to be accessible using hostname: [Discourse Subdomain] and Connection to [Discourse Subdomain] port 80) also fails”. First the app.yml didn’t even exist so I checked online and fixed it. I changed the port to 81 and also changed 443 and tried again, same error as if I didn’t change the port at all. I also checked if raspap might be causing issues and I saw it was using port 80. I changed it to 81 and still the same error. What am I doing wrong? Is this because I’m using a Raspberry Pi 5? Am I supposed to open ports in my router settings? I’m lost and sorry if this is a noob question, that’s probably because I’m a noob at this.

Hmm… are you following: [Bild] Install Discourse on a residential internet with Cloudflare Tunnel Sysadmins Since Discourse now has support for running on a Raspberry Pi, running a small instance in your home lab will become a common use case. However, many residential ISPs block incoming traffic to the ports 80/443 that Discourse need. For our demo site at https://discourse-on-a-pi.falco.dev/ we used Cloudflare Tunnel to work around this, and you can do it too! Setup your tunnel First, follow the following guide: The only change you need is changing the URL from url: http://localhost:8000 to url…

Nope, but will definitely try this out because I’m sure this is going to fix the issue I’m currently having. Thank you :slight_smile:

I managed to fix the error port 80 but I still can’t figure out why 443 is still not working. I’m not sure if raspap might be still using it, but I don’t think I can change it.

After taking forever to figure out the cloudflare tunnel thing I finally managed to make it connect without any port 80 and 433 errors following this guide: Install Discourse on a residential internet with Cloudflare Tunnel Then there was a 5 second countdown and it started doing it’s thing until it stopped. I thought maybe I’m done here so I visited the domain but it says it’s not responding. Localhost also doesn’t show anything at all. Am I starting it the wrong way? I didn’t change any configurations and even uninstalled and reinstalled everything with no luck. Rebuilding also just stops and doctor discourse says Discourse container app is running. So how do I access it on my local network to see if it’s even up on other devices?

[Bild] iam_best: So how do I access it on my local network to see if it’s even up on other devices? Your can try to cURL the raspberry ip and see if it responds. You can also check the tunnel health on the Cloudflare dashboard.

I’m getting curl: (7) Failed to connect to (IP here) port 80 after 0 ms: Could not connect to server The cloudflare dashboard says it’s healthy. What I forgot to mention is that I’m also hosting raspap which is a Hotspot for the Raspberry and it also hosts a web dashboard but I changed the port for it to 81.

So Discourse is supposed to be accessible from port 80 of your PI, but cURL can’t reach it from your other machine? Can you share your app.yml file ?

I tried curl on the pi itself. I also can’t access the website on my phone but I can access the other site that I’m hosting from the Pi’s IP with port 81 Here’s my app.yml file: templates: - templates/postgres.template.yml - templates/redis.template.yml - templates/web.template.yml - templates/web.ratelimited.template.yml - templates/web.ssl.template.yml - templates/web.letsencrypt.ssl.template.yml expose: - 80:80 - 443:443 params: db_default_text_search_config: pg_catalog.english db_shared_buffers: 4096MB env: LC_ALL: en_US.UTF-8 LANG: en_US.UTF-8 LANGUAGE: en_US.UTF-8 DISCOURSE_HOSTNAME: forum.iambest.net DISCOURSE_DEVELOPER_EMAILS: (private email) DISCOURSE_SKIP_EMAIL_SETUP: '1' UNICORN_WORKERS: 8 volumes: - volume: host: "/var/discourse/shared/standalone" guest: "/shared" - volume: host: "/var/discourse/shared/standalone/log/var-log" guest: "/var/log" hooks: after_code: - exec: cd: "$home/plugins" cmd: - git clone https://github.com/discourse/docker_manager.git run: - exec: echo "Beginning of custom commands" - exec: echo "End of custom commands"

You didn’t follow the guide at Install Discourse on a residential internet with Cloudflare Tunnel at all? Like you didn’t comment out the ports and templates.

[Bild] Falco: Like you didn’t comment out the ports and templates. Oh yeah you’re right. That’s because while I was troubleshooting I removed it because I wasn’t sure if that was why it didn’t work before. I also wasn’t sure if I was supposed to comment out the ports so I tried again without doing that and now it’s working… A little bit because this doesn’t look right [Screenshot_20260207-023626] I disabled Rocket thing like the guide said as well. Issue happens on both domain and on localhost

Port 443 über Hostname nicht erreichbar und Port 80 schlägt ebenfalls fehl

Produktunterstützung Installation

NateDhaliwal (Nate Dhaliwal) 5. Februar 2026 um 22:54 2

Hmm… folgen Sie:

Thema		Antworten	Aufrufe
Can't detect domain Self-hosting	5	560	16. Dezember 2022
Port 443 Not Accessible Self-hosting	7	2241	20. September 2020
Discourse and Noip Product Support	22	1410	9. April 2022
Port 443 of computer does not appear to be accessible using Self-hosting	26	5787	2. Juli 2021
Port 443 isn't accessible via hostname Self-hosting unsupported-install	8	1479	24. September 2020

Port 443 über Hostname nicht erreichbar und Port 80 schlägt ebenfalls fehl

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