Critical Threat
IP address 204.76.203.18 is a critical-risk address originating from the Netherlands with a threat level of 10/10 and 591 total abuse reports logged across automated honeypot sensors over a six-month observation window from September 2025 through March 2026. The dominant threat category is general hacking activity, supplemented by web application reconnaissance and isolated Internet of Things targeting, making this IP unambiguously hostile to any exposed service.
The report volume of 591 incidents across 20 separate honeypot sensor deployments demonstrates sustained, multi-vector hostile engagement rather than opportunistic scanning. With 15 hacking-category reports, 4 web application attack reports, and 1 IoT-targeted report, the IP exhibits a clear preference for intrusion attempts over other threat types. The network is operated by Pfcloud UG under ASN AS51396, providing sufficient context for network-level filtering decisions. The 67% confidence score reflects some uncertainty in attribution, though the sheer volume of reports from multiple independent sensors strongly supports a confident maliciousness assessment.
Hacking activity in this context encompasses automated intrusion attempts, vulnerability exploitation sequences, and unauthorized access probing against exposed services. Web application attacks target common coding flaws including injection vulnerabilities and authentication bypass vectors, posing direct risk to any internet-facing applications. IoT targeting suggests the IP is cataloguing or probing connected devices with weak security postures, potentially for later compromise or incorporation into botnet infrastructure. Together, these patterns indicate a compromised host or exit node being used for systematic external reconnaissance and exploitation.
Network operators should block 204.76.203.18 at the perimeter firewall and at any web application firewall layer. All exposed services should enforce strong, unique credentials and consider multi-factor authentication where feasible. Systems should be maintained on a rigorous patch cadence to mitigate vulnerabilities that hacking probes attempt to exploit. Monitoring tools such as fail2ban can automatically detect and respond to repeated connection patterns associated with this IP. Organizations with IoT deployments should ensure those devices reside on isolated network segments with no direct internet exposure.
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