: If the error persists, check the MSI or agent installation logs for more specific failure details.
: Ensure there are no firewall rules or network policies blocking the communication between the device and the SentinelOne server. sentinelone error code 2008
| Action | Owner | Status | Result | |--------|-------|--------|--------| | Restart SentinelOne agent service on all affected endpoints via Group Policy | Endpoint Team | Completed | Immediate clearing of Error 2008 (temporary). | | Adjust proxy TLS session timeout from 10 min → 60 min | Network Team | Completed | Reduced 2008 frequency by 85%. | | Set proxy keep-alive timeout to 180s (≥ agent ping interval + 50%) | Network Team | Completed | Eliminated idle drops. | | Upgrade SentinelOne agent to version 23.2.3.112 (fixes WebSocket retry logic) | Endpoint Team | In progress (70% of endpoints) | Permanent resolution confirmed on test group. | : If the error persists, check the MSI
| Component | Details | |-----------|---------| | | Versions 22.3.4.5210 and 23.1.1.102 (Windows 10/11, Server 2019/2022) | | Management Console | US-2 tenant (app.sentinelone.net) | | Network Path | Corporate LAN → Forward Proxy (Palo Alto) → Internet → S1 Gateway | | Proxy Configuration | Explicit proxy, port 8080, NTLM authentication | | Observed Symptoms | Intermittent 2008 errors every 45–90 minutes; resolved by agent restart (temporarily) | | | Adjust proxy TLS session timeout from
The error is non-fatal to core antivirus functions (on-access scanning, static detection continue) but disables:
2008 Display Message: "Agent unable to establish real-time channel. WebSocket handshake failed. Check network and proxy settings." Observed Log Entry (from SentinelOneAgent.log ): [ERROR] [WebSocketManager] Code 2008: TLS handshake timeout after 30s. Endpoint ID: <UUID>, Console: [tenant].sentinelone.net, Proxy: proxy.corp.local:8080.