01
Static public versus private IPs
A provider-assigned static public IP identifies an internet-facing connection or device. Private addresses are used inside the local network and are not directly routable on the public internet. NAT and firewall rules control how the two interact.
- Document assigned blocks and usable addresses
- Store gateway and subnet details securely
- Avoid direct exposure when a safer pattern exists
02
Common business use cases
Static addresses can support site-to-site VPN endpoints, partner allowlists, remote administration, hosted applications, mail or DNS infrastructure, and monitoring. Many cloud-managed services do not require one.
| Use case | Why static helps | Security note |
|---|---|---|
| VPN endpoint | Predictable peer address | Require strong authentication |
| Allowlists | Stable approved source | Review access regularly |
| Hosted service | Consistent DNS target | Minimize exposed ports |
| Monitoring | Known external address | Restrict management access |
03
Security and continuity
A static IP does not create security by itself and does not automatically make a network unsafe. Risk comes from exposed services, weak controls, unpatched systems, and poor monitoring. Document how addressing changes during failover.
- Default-deny inbound traffic
- Use VPN or zero-trust access where appropriate
- Test dependent systems after circuit changes