""ET INFO Google DNS Over HTTPS Certificate Inbound""

SID: 2049796

Revision: 4

Class Type: misc-activity

Metadata: affected_product Any, attack_target Client_Endpoint, created_at 2019_08_21, deployment Perimeter, performance_impact Low, signature_severity Informational, tag DoH, updated_at 2023_12_20, reviewed_at 2024_04_22, former_sid 2838109

Reference:

  • md5

  • 8064d8e4bfa66d1b6f665faf1ddf46b2

Protocol: tcp

Source Network: $EXTERNAL_NET

Source Port: [443,853]

Destination Network: $HOME_NET

Destination Port: any

Flow: established,to_client

Contents:

  • Value: "|55 04 06|"

  • Value: "|02|US"

  • Value: "|55 04 0a|"

  • Value: "Google Trust Services"

  • Value: "|55 04 03|"

  • Value: "|0a|dns.google"

Within: 11

PCRE:

Special Options:

  • fast_pattern

source