I am trying to enable reverse proxying as detailed int this tutorial:

https://www.digitalocean.com/community/tutorials/how-to-use-apache-as-a-reverse-proxy-with-mod_proxy-on-ubuntu-16-04#step-3-%E2%80%94-modifying-the-default-configuration-to-enable-reverse-proxy

When I use curl to access the mini Flask app created in this tutorial on port 8080, I can do it perfectly fine with curl http://127.0.0.1:8080. However, if I use http://mydomain.com:8080, I get a connection refused error.

I have tried disabling ufw with sudo ufw disable. I’ve disabled iptables. I have no firewall running from the web-based control panel. If I run netstat -plan, I can see that 127.0.0.1:8080 is marked as “LISTEN”.

If I use nmap -sS -O 127.0.0.1, I can see that port 8080 is my proxy. However, if I use nmap -sS -O mydomain.com, I do not see 8080 at all.

What am I missing? How do I open 8080?

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3 answers

Where is your DNS Hosted?
If you’re using a proxy provider like cloudflare, and have the orange cloud enabled, it will only proxy port 80 and 443 traffic.

I figured it out. I had to add ‘Listen 8080’ to my apache conf file.

Hello, @fadecomic

Yes port 8080 needs to be added in the Apache configuration file in order to set this up, changing it from the default which is 80. Another thing to have in mind is to make sure the port itself is not closed from the Firewall as well.

Regards,
Alex

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