alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DYN_DNS Dyndns Client User-Agent"; flow:established,to_server; http.user_agent; content:"DynDNS-Client"; classtype:not-suspicious; sid:2014092; rev:5; metadata:created_at 2012_01_03, former_category POLICY, confidence High, signature_severity Informational, updated_at 2024_06_11;)