Severe Risk
IP 176.65.149.55 is a maximum-threat-level address operated by Pfcloud UG in the Netherlands that has been linked to 4,944 abuse reports over approximately one year, representing a high-confidence, high-frequency intrusion threat targeting exposed services.
Automated honeypot sensors detected 20 recent reports specifically categorizing this address under hacking activity, with a detection confidence of 86 percent and an activity frequency rated 8 out of 10. The IP was first reported in August 2025 and most recently reported in July 2026, indicating persistent hostile behavior over an extended period. Network registration records identify AS51396 and Pfcloud UG as the hosting entity, placing the source within Netherlands infrastructure commonly associated with bulletproof hosting arrangements that complicate takedown efforts.
The detected activity pattern of SSH sessions established on non-standard ports signals automated credential brute-forcing or credential-stuffing campaigns targeting SSH services that administrators have relocated from default ports. This intrusion technique allows threat actors to gain unauthorized remote access to Linux systems, deploy persistent backdoors, exfiltrate sensitive data, or enroll compromised hosts into botnets for subsequent distributed attacks. The volume of reports indicates this address conducts attacks continuously rather than opportunistically, suggesting it operates as part of an organized scanning or assault infrastructure.
Operators should block 176.65.149.55 at the network perimeter immediately and implement fail2ban or equivalent dynamic firewall rules to auto-block repeat offenders. Enforcing key-based authentication exclusively, disabling password authentication entirely, and restricting SSH access to known IP ranges via firewall allowlists significantly reduces exposure. Continuous monitoring for unusual authentication patterns and maintaining current system patches across all internet-facing services are essential defensive measures against this class of automated intrusion attempt.
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