alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY OpenVPN Update Check"; flow:established,to_server; http.user_agent; content:"Twisted PageGetter"; depth:18; endswith; http.host; content:"swupdate.openvpn.net"; fast_pattern; depth:20; endswith; classtype:policy-violation; sid:2014799; rev:5; metadata:created_at 2012_05_22, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_15;)