{"id":"hcloud-firewall-port-only-tcp-udp","text":"The `--port` flag on firewall rules is only valid for `tcp` and `udp` protocols; it cannot be used with `icmp`, `esp`, or `gre`.","truth_value":"IN","source":"entries/2026/03/11/hcloud_firewall_add-rule.md","source_url":"","source_hash":"0f4938f814407c0a","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"hcloud-firewall-port-only-tcp-udp","truth_value":"IN","reason":"premise"}]}}