Under Review

Sophos XGS import doesn't recognize generated tarball

I want to create a WebFilterException template for use on several XGS firewals.  I extracted edited the Entites.xml file to strip out the built-in entries.  Then in terminal "tar cvf O365_Exceptions.tar Entities.xml". The resulting file will not import into another firewall, saying it's not a tar file.  What is the correct process for doing this?