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Static IP addresses: when you need one
By Vicky Ogola, Senior ICT Consultant 1 min read
A fixed public address helps with partner allow-lists, VPNs and on-site services — and brings security responsibilities.
Most connections receive a public IP address that can change. Some organisations need a fixed — static — address.
When a static IP helps
- A partner, bank or service only allows access from known addresses.
- You connect offices with site-to-site VPNs.
- You host a service on your premises that must be reachable from outside.
- Remote access or monitoring tools need a stable address.
When it is not needed
If staff only browse and use cloud services, a dynamic address works perfectly well.
Security responsibilities
A fixed address is easier for attackers to find and probe repeatedly. Keep firewall rules strict, expose only necessary services and monitor for unusual traffic.
Alternatives
Dynamic DNS can provide a stable name for a changing address. Cloud-hosted services often remove the need to host anything on site.
Ask your provider
Static addresses are usually an add-on to business plans; check cost and how many addresses you need.
See our business connectivity services.
About the author
Vicky Ogola
Senior ICT Consultant
Vicky Ogola writes about network design, connectivity, data centres and the infrastructure that business systems depend on.