Modifying a hosts file allows a site to be tested with a different domain before the global DNS system has been modified or updated to point to VIP. This modification only affects a user’s local computer, and will need to repeated on any other devices that are used for testing.
A hosts file consists of IP addresses listed against domains. For example:
188.8.131.52 example.com 184.108.40.206 wpvip.com
In the above example,
wpvip.com are modified to point at
220.127.116.11, a VIP IP address.
To determine the IP address for a VIP application, run the command
host against an application’s convenience domain. For example:
$ host example-com.go-vip.net example-com.go-vip.net has address 127.0.0.1 example-com.go-vip.net has address abcd:efgh:ijkl::c000:1234
All modern operating systems make use of a hosts file, but the process for modifying the file varies slightly for each system.
If the changes are not reflected immediately, clear the browser cache and try visiting the site again. Remember to revert all of the changes once testing is complete.
macOS and Linux
- Open a Terminal window.
- Enter the following command to open the hosts file in a text editor:
sudo nano /etc/hosts.
- Enter the root password at the prompt.
- Add the IP address and domain needed for testing.
yat the prompt to save the changes.
- Press the Windows key.
- Type Notepad in the search field.
- In the search results, right-click Notepad and select Run as administrator.
- From Notepad, open the following file:
- Add the IP address and domain needed for testing to the file and save the changes.