Question

How can i open up tcp port 53 for non DNS traffic?

I can only seem to pass DNS traffic through on that port.

Submit an answer


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!

Sign In or Sign Up to Answer

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.

seang1 • October 3, 2019
Accepted Answer

Ignore me, it’s the same for EC2 so must be something my end

Denemee • May 16, 2020

I think I have the same problem. I cannot use 53 / udp port on my vps server for python “socket”. Please can you tell me a detailed help text on how to do it?

python socket, example script’s error output

Traceback (most recent call last):
  File "serverr.py", line 4, in <module>
    server_socket.bind(('0.0.0.0', 53))
OSError: [Errno 98] Address already in use
seang1 • October 3, 2019

I’m security testing and the target is only allowed outbound 53. It’s not a binding problem as netstat doesn’t show anything listening and the same happens with a fresh EC2 also. I’ll dig some more tomorrow, but at least I know it’s not a digital ocean issue. Thanks

Try DigitalOcean for free

Click below to sign up and get $200 of credit to try our products over 60 days!

Sign up