What Is sophosxl.net
The domain *.sophosxl.net is the Sophos eXtensible List domain and is used by the Web Proxy and Antivirus for security and categorization lookups using HTTP and DNS queries on Sophos products.
SXL uses ports 80 and 53

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.