About the firewall policy

The firewall policy specifies how the firewall protects computers. Only named applications, or classes of applications are allowed to access the company network or internet.

Note Sophos Client Firewall is not supported on server operating systems. For hardware and operating system requirements, see the system requirements page of the Sophos website.
Caution You must configure the firewall policy before use. Deploying an unmodified default policy to a group via Sophos Enterprise Console will cause problems with network communications.

The default firewall policy is not intended to be deployed "as is" and is not adequate for normal use. This is a base for you to build up your own policy.

By default, the firewall is enabled and blocks all non-essential network traffic. Anything more than basic networking, for example, your email software, web browser and any network database access, will probably not function correctly with the default policy which blocks all non-essential connections. Therefore, you should configure it to allow the traffic, applications, and processes you want to use, and test it prior to installing and running the firewall on all computers.