alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed Cloudflare DNS over HTTPS Domain (cloudflare-dns .com in TLS SNI)"; flow:established,to_server; tls_sni; content:"cloudflare-dns.com"; isdataat:!1,relative; threshold: type both, track by_src, count 1, seconds 600; metadata: former_category POLICY; reference:url,developers.cloudflare.com/1.1.1.1/dns-over-https/json-format; classtype:trojan-activity; sid:2027695; rev:2; metadata:affected_product Any, attack_target Client_Endpoint, deployment Perimeter, signature_severity Audit, created_at 2019_07_09, performance_impact Low, updated_at 2019_07_12;)

Added 2019-07-12 18:35:01 UTC


alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET POLICY Observed Cloudflare DNS over HTTPS Domain (cloudflare-dns .com in TLS SNI)"; flow:established,to_server; tls_sni; content:"cloudflare-dns.com"; isdataat:!1,relative; metadata: former_category POLICY; reference:url,developers.cloudflare.com/1.1.1.1/dns-over-https/json-format; classtype:trojan-activity; sid:2027695; rev:1; metadata:affected_product Any, attack_target Client_Endpoint, deployment Perimeter, signature_severity Audit, created_at 2019_07_09, performance_impact Low, updated_at 2019_07_09;)

Added 2019-07-09 18:22:47 UTC


Topic revision: r1 - 2019-07-12 - TWikiGuest
 
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