alert http any any -> $HTTP_SERVERS any (msg:"ET INFO Possible ThousandEyes User-Agent Inbound"; flow:established,to_server; http.user_agent; bsize:74; content:"Mozilla/5.0 AppleWebKit/999.0 (KHTML, like Gecko) Chrome/99.0 Safari/999.0"; fast_pattern; reference:url,thousandeyes.com; classtype:misc-activity; sid:2021026; rev:4; metadata:created_at 2015_04_28, confidence Medium, signature_severity Informational, updated_at 2024_03_10;)