dns node-local-dns: cache polluted by EDNS0 client subnet

coredns support EDNS0 client subnet (ECS) to forward dns requests with "real" client ip. But its cache module does not support it: https://github.com/coredns/coredns/issues/1628

In a same node, pod A resolves domain with ECS (for test or cache pollution attack or other reasons) and other pods send DNS requests without ECS (normal scenario). The cache of node-local-dns will be polluted by pod A.

As a node-level "local" dns caching service, EDNS0 client subnet should be disabled, before coredns implements per-CIDR cache or supports caching for ECS.

Oct 21 '24 05:10 mchtech

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Jan 19 '25 06:01 k8s-triage-robot

/remove-lifecycle stale

Jan 20 '25 04:01 mchtech

The Kubernetes project currently lacks enough contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

After 90d of inactivity, lifecycle/stale is applied
After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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/lifecycle stale

Apr 20 '25 05:04 k8s-triage-robot

/remove-lifecycle stale

Apr 21 '25 02:04 mchtech

The Kubernetes project currently lacks enough contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

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After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

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/lifecycle stale

Jul 20 '25 03:07 k8s-triage-robot

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

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Aug 19 '25 03:08 k8s-triage-robot

/remove-lifecycle rotten

Aug 19 '25 10:08 mchtech

The Kubernetes project currently lacks enough contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

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/lifecycle stale

Nov 17 '25 10:11 k8s-triage-robot

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

After 90d of inactivity, lifecycle/stale is applied
After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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/lifecycle rotten

Dec 17 '25 10:12 k8s-triage-robot