Elevated Risk
IP 204.76.203.231 is a high-risk address with a threat level of 8/10 that has generated 7,734 abuse reports since September 2025, primarily for general hacking activity including targeted attacks against IoT infrastructure, Redis exploitation attempts, and VoIP fraud schemes. Operating from the Netherlands through AS51396 (Pfcloud UG), this IP presents a concrete threat to exposed services worldwide.
Automated honeypot sensors across 20 reporting sources detected this address repeatedly between September 2025 and March 2026. Despite the substantial report volume, activity frequency is measured at 0/10, indicating periodic rather than continuous engagement. The detection profile shows a concentration of 20 hacking-related reports alongside isolated incidents involving IoT targeting, exploited-host behavior, and VoIP fraud. The network operator, Pfcloud UG, provides infrastructure that has been repeatedly implicated in automated attack campaigns, and the geographic location in the Netherlands places this IP within a European routing environment commonly associated with both legitimate hosting and malicious activity.
The dominant hacking activity encompasses intrusion attempts, vulnerability exploitation, and unauthorized access campaigns. The IoT-targeted component specifically references attacks against connected devices with weak security postures, including those with default credentials or unpatched firmware. Redis exploitation vectors suggest attempts to compromise database servers through command injection or authentication bypass. VoIP fraud activity indicates this infrastructure may be leveraged for toll fraud, service abuse, or anonymized communications. The combination of these vectors suggests a sophisticated actor capable of adapting exploitation techniques across multiple service types.
Site operators should immediately block this IP at the firewall or network edge to prevent automated reconnaissance and exploitation attempts. Implementing fail2ban or comparable rate-limiting tools can automatically mitigate repeated connection attempts from this source. Exposed Redis instances should enforce strong authentication, bind exclusively to internal interfaces, and verify that no command execution features are accessible without proper credentials. Organizations with IoT deployments should segment these devices on isolated network zones, update firmware regularly, and replace default credentials with complex alternatives.
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