Sentinel by Guangyu Song

Support

For help with Sentinel, email sentinel@guangyusong.com.

Useful Details To Include

• Your macOS version.
• The Sentinel app version.
• Whether the Network Extension is enabled, disabled, awaiting approval, or failed.
• A short description of what you expected and what happened.

Network Extension Approval

Sentinel's filtering features require macOS approval. If filtering is not active, open Sentinel and use the filter approval or repair flow shown in the app.

Blocklists

Blocklist subscriptions are optional and must use HTTPS. A malformed, unavailable, oversized, or combined list over 20,000 entries is rejected without replacing the currently active blocklist rules.

Privacy Requests

Sentinel stores connection history and rules locally on your Mac. You can delete local history from the app. For privacy questions, email the same support address.