Service that listens only in the 127.0.0.1 on the node

Hello,

I’m quite new on k8s, so this question may be stupid…

I have a k3s node with several services. I’d like to add one that responds only on the 127.0.0.1 of the host, and not the public ip. Like a nodeport but listens only on 127. 0.0.1

Can someone give me a hint?