website/content/en/docs/reference/command-line-tools-reference/feature-gates/IPTablesOwnershipCleanup.md

title	content_type	_build	stages	removed
IPTablesOwnershipCleanup	feature_gate	list render never false	stage defaultValue fromVersion toVersion alpha false 1.25 1.26 stage defaultValue fromVersion toVersion beta true 1.27 1.27 stage defaultValue fromVersion toVersion stable true 1.28 1.29	true

This causes kubelet to no longer create legacy iptables rules.