Security Heartbeat blocked PC after format

 Nikolaos Zisis 

Sophos XG firewall is doing exactly what it's supposed to.  no heartbeat, no trust for internet or lateral movement of network traffic

To fix this, reinstall the endpoint client so that endpoint generates healthy heartbeat for firewall to trust.

Firewall will still allow access to sophos central, so link to client download can be provided, a trusted share on network for access to client installer, or on a usb drive

... also, you may need to manually clear/acknowledge the infection event in central.  The above steps assuming you have already done this as part of the OS reinstall/re-image process.

 Nikolaos Zisis 

Sophos XG firewall is doing exactly what it's supposed to.  no heartbeat, no trust for internet or lateral movement of network traffic

To fix this, reinstall the endpoint client so that endpoint generates healthy heartbeat for firewall to trust.

Firewall will still allow access to sophos central, so link to client download can be provided, a trusted share on network for access to client installer, or on a usb drive

... also, you may need to manually clear/acknowledge the infection event in central.  The above steps assuming you have already done this as part of the OS reinstall/re-image process.