curl -v https://<your-console-url>:443 telnet <console-fqdn> 443 nslookup <console-fqdn>
If your error is not 2008, do not apply network fixes — refer to SentinelOne’s official error code matrix. sentinelone error 2008
SentinelOne agents require outbound HTTPS (port 443/TCP) to specific IP ranges and domains. If your corporate firewall, proxy, or Zscaler appliance blocks these destinations, the handshake fails, returning Error 2008. curl -v https://<
On older systems like Windows Server 2008 R2 or Windows 7, ensure you have the Microsoft Identity Verification Root Certificate Authority 2020 and the KB3042058 (TLS cipher update) installed, as missing certificates can cause the installer to fail prematurely. :443 telnet <