**Language / Язык:** [English](firewall.md) | [Русский](../ru/domains/firewall.md)

# Firewall

Cluster, node, and guest firewall configuration — rules, aliases, IP sets,
security groups — persists primarily through cluster/node metadata and related
structures.

Handlers cover the declared firewall surface for majors 6–9. Apply the major you
care about before asserting version-specific field names.
