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"Wanna" ransomware outbreak. Please see this Sophos article sophos.com/kb/126733 for advice on how to protect your organization. Immediate action recommended.
Enterprise Console may sometimes be unable to contact the copy of Sophos Remote Management System (RMS) on computers (endpoints) running Sophos Anti-Virus for Windows. This causes the computers to react slowly to commands from the console, as they only receive instructions when they request them.
This is because a firewall or NAT (network address translation) is preventing inward communications. The central console should be able to contact the endpoint to notify it of new instructions.
RMS by default operates in active consumer mode in which endpoints poll the server for messages (by default this happens approximately every 15 minutes).
The server can notify an endpoint that messages are available; the endpoint will then poll the server and collect the messages. If the notification messages can't reach the endpoint, the endpoint will get the messages only through periodic polling. This can cause the endpoint to be slow to react to commands sent from the server.
This issue will also show in the Sophos Network Communications Report.
Applies to the following Sophos products and versions Sophos Anti-Virus for Windows 2000+
Open the required ports for RMS in your firewall software or NAT. See, Sophos Anti-Virus for Windows: access to computers with firewalls.
NOTE: The Sophos client firewall automatically recognizes RMS. No further configuration is needed.
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