Magento Open Source 2.2.x
Developer Client Restrictions

Developer Client Restrictions can be set in Developer Mode only.

Add Your IP Address to the Whitelist

1. On the Admin sidebar, tap Stores. Then under Settings, choose Configuration.
2. In the panel on the left under Advanced,choose Developer.
3. Expand the Developer Client Restrictions section.
4. In the Allow IPs field, enter your IP address. If access is needed from multiple IP addresses, separate each with a comma.
5. When complete, tap Save Config.
6. When prompted, refresh any invalid caches.