Kubernetes - Cilium Routes Cluster Traffic through Public Interface


I recently created a DigitalOcean Kubernetes cluster. However, Cilium is routing node-to-node traffic via the public interfaces on the Droplet, instead of the internal interfaces (10.x.x.x).

This makes doing certain things, like using the PROXY protocol on load balancers and setting trusted IP ranges on NGINX Ingress difficult, since when autoscaling, new nodes might have completely random and unpredictable IPs.

Is there a DigitalOcean approved method to update Cilium to route traffic properly that won’t be overwritten when DO does managed updates/upgrades?

Thank you

Show comments

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.

Accepted Answer


After a lot of research, I discovered that managed Kubernetes agents are automatically added to a Firewall (in the Networking tab) which prevents all access.

As a result, I can remove the trusted IP settings. I would still prefer that network traffic occur on the private network, but it’s not as much of a show stopper.


Try DigitalOcean for free

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

Sign up

Get our biweekly newsletter

Sign up for Infrastructure as a Newsletter.

Hollie's Hub for Good

Working on improving health and education, reducing inequality, and spurring economic growth? We'd like to help.

Become a contributor

Get paid to write technical tutorials and select a tech-focused charity to receive a matching donation.

Welcome to the developer cloud

DigitalOcean makes it simple to launch in the cloud and scale up as you grow — whether you're running one virtual machine or ten thousand.

Learn more
DigitalOcean Cloud Control Panel