alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"🐾 - ℹ Linux 🐧 Vendor Firmware Service"; flow:to_server, stateless; threshold:type limit, track by_src,count 1, seconds 86400; tls_sni; content:"cdn.fwupd.org"; nocase; reference:url,https://fwupd.org/; metadata:created_at 2022_03_14, updated_at 2022_06_15; sid:3300794; rev:2; classtype:misc-activity;)