Question

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

Posted on October 3, 2019
DigitalOcean Accounts Firewall
Asked by seang1

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

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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