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Can not receive UDP packet on Oracle Cloud Compute instance.

edited Jul 15, 2021 4:10AM in OCI - General 3 comments

Summary

I send a UDP packet to Oracle Cloud Compute instance. It doesn't get there.

Content

On Oracle Cloud Compute instance, I run "netcat -u -l -p 20000".

On my home computer I run "echo hello|netcat -u 150.230.43.58 20000".  Packet never gets to my Oracle Cloud Compute instance.  150.230.43.58 is my Oracle Cloud Compute instance public IP address.  "ping 150.230.43.58" works from home.  "ssh ubuntu@150.230.43.58" works.

If I run "netcat -u -l -p 20000" on my home computer and run "echo hello|netcat -u myhomecomputer 20000", then packet gets to my home computer.

In my Security List I have a single ingress rule that says "All traffic for all ports" under "allows".

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