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Public IP vs. Private IP: What's the Difference?

Understand internet-facing addresses versus addresses used inside a home network.

Quick Answer

A public IP identifies the internet connection externally, while private IP addresses identify devices within the local network.

Step by Step

  1. Determine whether the problem affects one device or every device on the network.
  2. A public IP identifies the internet connection externally, while private IP addresses identify devices within the local network.
  3. Change one setting or component at a time and test again.
  4. Record existing router/network settings before changing passwords, DNS, addressing, or advanced configuration.

If That Doesn't Work

  • Router menus, indicator lights, and terminology vary by manufacturer and internet provider.
  • Avoid factory-resetting a modem/router unless you know how it is provisioned and have the information needed to restore the connection.