Public IPs
A public IP without moving your server
Keep your server in place with an assessed public IP delivery path. Compare direct assignment and gateways, then verify firewall rules and reply routing.
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Connections worth understanding.
Practical writing on private access, public reachability and the routes in between. For the people building and looking after their own infrastructure.
Featured guide / Outbound
IP allowlisting for a team that doesn’t sit in one office
Use a stable outgoing IP for provider allowlists. Check address exclusivity, IPv4 and IPv6 routing, authentication and recovery before rollout.
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Start with the question in front of you. Find a guide, compare the choices and work through the details.
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Publish
A public URL or a public IP?
Compare a public URL for a web app or API with a public IP for infrastructure. Choose by protocol, audience, exposure and the required return path.
Public IPs
Moving an application between providers: which connection assumptions change?
Before moving an application between providers, check public addresses, outbound allowlists, DNS caches, private dependencies and a workable rollback plan.
Networks
A contractor needs one application. How much network access should you give them?
Give a contractor access to the required application, with separate login permissions, allowed and denied tests, an end date and an owner for removal.
Networks
DDNS gives you a name. Who should get access?
Dynamic DNS updates a hostname when an IP changes. Compare that naming job with private access, application publishing and public IP reachability.
Outbound
What to prepare before asking for a dedicated outbound IP
Prepare a dedicated outbound IP request with the workload, routing scope, retention terms, allowlist owners, acceptance tests and a recovery procedure.
Public IPs
ERP on customer premises: keeping the server where the business needs it
Keep an ERP server on customer premises while assessing public IP delivery, service exposure, full-tunnel effects, ownership and recovery checks.
Outbound
Full tunnel or split tunnel? Start with what the traffic needs to do
Full tunnel routes internet traffic through an exit; split tunnel routes selected traffic. Compare scope, local routes, DNS, IPv6 and failure behavior.
Public IPs
One gateway, several servers: planning public port mappings
Plan one gateway’s public port mappings to multiple servers. Define protocol and external port, restrict callers, and verify each target’s return route.
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