Choose your Location and Language

Americas

Europe

Asia and Oceania

What is the difference between a public and private IP address?

Public and private IP (Internet Protocol) addresses ... sometimes called "external" and "internal" IP addresses ... both exist for the same reason: to provide unique identification to every device on a network.

Here's what they mean:

Public (external) IP addresses

A public (or external) IP address is the one that your ISP (Internet Service Provider) provides to identify your home network to the outside world. It is an IP address that is unique throughout the entire Internet.

Depending on your service, you might have an IP address that never changes (a fixed, or static IP address). But most ISPs provide an IP address that can change from time to time (a dynamic IP address). For the vast majority of users, a dynamic IP address is fine.

When you're setting up your router, if your ISP issued you a static IP address, you enter it into your router's settings. For a dynamic IP address, you specify DHCP in your router's network settings. DHCP is Dynamic Host Control Protocol. It tells your router to accept whatever public IP address your ISP issues.

Private (internal) IP addresses

Just as your network's public IP address is issued by your ISP, your router issues private (or internal) IP addresses to each network device inside your network. This provides unique identification for devices that are within your home network, such as your computer, your Slingbox, and so on.

Similar to the arrangement with public IP addresses, each device on your network has its network configuration settings on DHCP, so it can accept the unique private IP address that your router issues it.

These private IP addresses never leave your network, just as your public IP address is never used inside your network. The router controls all the network traffic, both within your home network and outside of it, to the Internet. It is the router's job to make sure that data flows to and from all the correct places.

Did this article help?
Yes
No
If it didn't help, why not?
Select all that apply.
The steps provided are too complex.
The steps provided are too general.
It's too techie! Please make it more clear.
The information or solution provided didn't work.
The info helped, but the steps were wrong.
How can we make it better?
(Please don't write support questions. We can't respond.)
 
  • All Sling services are functioning normally.
Log in with your Sling Account and get info about your Slingbox, including current Internet Viewing status and Slingbox ID information.
Log In
Loading...
All

Need Help?

Slingbox FAQ
Before you call, please check out the Slingbox FAQ.
1-877-GO-SLING
Phone support is available 7am to 7pm PST, everyday.

Login to view more help options

Slingbox Answers Forum
Ask for help or help others in our technical support forum
Sling Support Videos
Our Support Video library offers the latest tech tips and configuration help
Symbi
Download an amazing support app (Windows only, Mac coming soon!)