Question
Cannot connect to app externally
- Posted on May 17, 2020
- FirewallDigitalOcean Cloud FirewallsPython
Asked by nevessmichel
I have a python app running at port 9000 and want to connect externally. So, I open port 9000 in ufw, checked wheather port app is listen and created rule at Digital Ocean firewall. I can connect to postgres at port 5432 and ssh, but cannot connect to port 9000.
sudo netstat -plnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 692/systemd-resolve
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 877/sshd
tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN 937/postgres
tcp 0 0 0.0.0.0:9000 0.0.0.0:* LISTEN 1184/python3.6
tcp6 0 0 :::22 :::* LISTEN 877/sshd
tcp6 0 0 :::5432 :::* LISTEN 937/postgres
sudo ufw status
Status: active
To Action From
-- ------ ----
9000/tcp ALLOW Anywhere
9001/tcp ALLOW Anywhere
10001/tcp ALLOW Anywhere
10000/tcp ALLOW Anywhere
5432/tcp ALLOW Anywhere
22/tcp ALLOW Anywhere
22 ALLOW Anywhere
9000/tcp (v6) ALLOW Anywhere (v6)
9001/tcp (v6) ALLOW Anywhere (v6)
10001/tcp (v6) ALLOW Anywhere (v6)
10000/tcp (v6) ALLOW Anywhere (v6)
5432/tcp (v6) ALLOW Anywhere (v6)
22/tcp (v6) ALLOW Anywhere (v6)
22 (v6) ALLOW Anywhere (v6)
Can someone help me, please?
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
Hi there @nevessmichel,
This actually looks all correct, so I think that it might be your local network closing the connections to that custom port. In order to do that you could run the following command from your computer:
If you are not able to connect then this would indicate that port 9000 is closed on your local network.
Let me know how it goes! Regards, Bobby