alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - 🚨 Opera Browser 🌐 Old version 👴"; flow:to_server, stateless; threshold:type limit, track by_src,count 1, seconds 86400; http.user_agent; content:"Opera/"; nocase; reference:url,https://www.opera.com/; metadata:created_at 2021_08_03, updated_at 2022_06_13; sid:3300106; rev:4; classtype:policy-violation;)