IBM Cloud VPC Public Gateways: Choosing Subnet Egress Over Floating IPs
IBM Cloud VPC public gateways provide subnet-level outbound internet access without per-instance floating IPs, but they are an egress path, not a security boundary.
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IBM Cloud VPC Security Groups for Three-Tier VSI Workloads: A Stateful Allow-List Pattern
Learn to secure a three-tier IBM Cloud VPC VSI workload with stateful security-group references instead of CIDRs, including CLI configuration, validation tests, and common pitfalls.
Providing Outbound-Only Internet Access in IBM Cloud VPC with a Zonal Public Gateway
Learn how to give private IBM Cloud VPC subnets outbound-only internet access using a zonal public gateway, with routing, security group, and ACL configuration steps.