Intermediate Threat
IP 213.209.157.54 is a German IP address operated by Moon Dc under ASN AS208485 that presents a moderate threat level (5/10) with a history of email spam activity, though current activity is assessed at minimal levels by automated honeypot sensors and community reporting systems.
According to the available intelligence data, IP 213.209.157.54 has accumulated 7881 total abuse reports, with 20 recent reports specifically categorised as Email Spam. All detections originated from automated honeypot sensors, and the available evidence spans a single reporting month in October 2025. The 55% confidence score indicates moderate certainty regarding the threat classification, while the activity frequency rating of 0/10 suggests that no significant malicious behaviour has been observed in recent observation windows despite the substantial historical report volume. The geographic concentration in Germany and the hosting context provided by Moon Dc's network infrastructure are relevant context for assessing the operational profile of this address.
Email spam represents the dominant threat category attributed to this IP, involving the mass distribution of unsolicited commercial messages or malicious content through SMTP channels. While the high total report count indicates past involvement in spam distribution, the current inactivity assessment means this address may represent a lapsed or rotating threat vector rather than an active one. Real-world risks associated with email spam include exposure to phishing campaigns, credential harvesting attempts, and malware delivery mechanisms embedded in message payloads, all of which can compromise end-user security when messages are opened or links are clicked.
Site operators should consider implementing a layered email security posture including SPF, DKIM, and DMARC authentication protocols to validate incoming messages and reduce spoofing risks. Deploying reputable email filtering services can further intercept spam before it reaches user inboxes. For direct server protection, tools such as fail2ban can automatically detect and block repeated SMTP abuse patterns, while monitoring for new reports against this address on threat intelligence feeds is advisable given the historical abuse pattern. Blocking or rate-limiting SMTP connections from untrusted sources on mail relay infrastructure remains a practical hardening measure.
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