gcloud compute firewall-rules list

gcloud compute firewall-rules describe <FIREWALL_RULE_NAME>
gcloud compute firewall-rules describe allow-http

gcloud compute firewall-rules list --filter="targetTags:<VM_TAG>"
gcloud compute firewall-rules list --filter="targetTags=web-server"

gcloud compute firewall-rules list --filter="direction:INGRESS"
gcloud compute firewall-rules list --filter="direction:EGRESS"

# 查詢所有允許 TCP 80 (HTTP) 連線的規則
gcloud compute firewall-rules list --filter="allowed.tcp=80"

# 查詢所有允許 TCP 22 (SSH) 連線的規則
gcloud compute firewall-rules list --filter="allowed.tcp=22"