More on the latest variant of 'Petya' Ransomware outbreak here
With the release of Sophos UTM version 9.1, you can now create firewall rules based on source MAC (media access control) addresses.
This functionality provides stricter security as it prevents users from setting a static IP address and potentially gaining access to filters based on that IP address.
Known to apply to the following Sophos product(s) and version(s) Sophos UTM
Operating systems UTM 9.1 or higher
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