VideosAsyncOS 12.0 Suggest EditsHow-Tos External Threat Feeds (ETF) Sender Domain Reputation (SDR) DNS-based Authentication of Named Entities (DANE) Smart Licensing Cisco Threat Response (CTR) Updated about 1 year ago Table of Contents How-Tos External Threat Feeds (ETF) Sender Domain Reputation (SDR) DNS-based Authentication of Named Entities (DANE) Smart Licensing Cisco Threat Response (CTR)