alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET INFO Microsoft Connection Test"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/connecttest.txt"; bsize:16; http.host; content:"www.msftconnecttest.com"; bsize:23; fast_pattern; reference:url,learn.microsoft.com/en-us/troubleshoot/windows-client/networking/internet-explorer-edge-open-connect-corporate-public-network; classtype:misc-activity; sid:2031071; rev:4; metadata:created_at 2020_10_21, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_12_01;)