Maximum Danger
IP 45.153.34.187 is a high-risk address assessed at threat level 10/10 that has generated 168 abuse reports through automated honeypot sensors, with web application attacks accounting for the majority of recent malicious activity targeting exposed services.
The IP originates from the Netherlands and operates through Pfcloud UG (haftungsbeschrankt) on ASN AS51396. Community reports and automated honeypot sensors logged activity between February and March 2026, with the dominant threat category being web application attacks at 20 recent reports, supplemented by three general hacking attempts. Detection systems flagged Suricata stream anomalies indicating packets with invalid timestamps alongside web application reconnaissance probes, suggesting the address was used to scan and probe target systems at the application layer.
Web application attacks target vulnerabilities in HTTP-based services, including those described in the OWASP Top 10, such as injection flaws, broken authentication, and security misconfigurations. The associated Suricata alert points to low-level packet anomalies that can indicate reconnaissance activity or attempts to exploit timing-based vulnerabilities in stateful network connections. Even isolated web application probes can expose internal system information or enumerate running services, lowering the barrier for follow-up exploitation. The high volume of reports against this single address within a compressed timeframe demonstrates persistent, automated scanning behaviour rather than one-off accidental contact.
Site operators should deploy a web application firewall to filter malicious HTTP requests matching common attack patterns and block known malicious user-agent signatures. Rate-limiting incoming connections and enforcing strong, multi-factor authentication on administrative interfaces reduces exposure to credential-based follow-up attempts. Regular patching of web frameworks and content management systems closes publicly known vulnerabilities. Additionally, monitoring for the Suricata stream anomaly signatures and blocking source addresses that generate repeated invalid-packet alerts provides an extra hardening layer against automated recon and exploit delivery.
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