# IP whitelist > Introduced in GitLab 9.4. NOTE: **Note:** We intend to [rename IP whitelist as `IP allowlist`](https://gitlab.com/gitlab-org/gitlab/-/issues/7554). GitLab provides some [monitoring endpoints](../../user/admin_area/monitoring/health_check.md) that provide health check information when probed. To control access to those endpoints via IP whitelisting, you can add single hosts or use IP ranges: **For Omnibus installations** 1. Open `/etc/gitlab/gitlab.rb` and add or uncomment the following: ```ruby gitlab_rails['monitoring_whitelist'] = ['127.0.0.0/8', '192.168.0.1'] ``` 1. Save the file and [reconfigure](../restart_gitlab.md#omnibus-gitlab-reconfigure) GitLab for the changes to take effect. --- **For installations from source** 1. Edit `config/gitlab.yml`: ```yaml monitoring: # by default only local IPs are allowed to access monitoring resources ip_whitelist: - 127.0.0.0/8 - 192.168.0.1 ``` 1. Save the file and [restart](../restart_gitlab.md#installations-from-source) GitLab for the changes to take effect.