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66.132.172.208 has a threat confidence score of 70%. This IP address from United States (AS398324, Censys, Inc.) has been observed in 15 honeypot sessions targeting POSTGRES, DOCKER, SSH, SMTP, FTP protocols. First observed on March 21, 2026, most recently active March 21, 2026.
FTP session where the client issues AUTH TLS to upgrade the connection to Transport Layer Security. This reflects protocol-level encryption negotiation prior to further interaction.
SMTP interaction identified as an internet-wide scanning probe originating from Censys infrastructure. The client announces itself via EHLO www.censys.io and issues a STARTTLS request to verify TLS upgrade support and collect service capability metadata. This pattern reflects automated reconnaissance and exposure mapping rather than direct exploitation, but still represents active external probing of the SMTP service.