Significant Threat
IP 85.158.110.210 is a high-risk address originating from the Netherlands that has been linked to sustained port-scanning reconnaissance activity, accumulating over 2,200 abuse reports from automated honeypot sensors during March–April 2026. With a threat level of 8/10 and a 73% confidence score, this IP presents a credible risk as an active reconnaissance platform probing external network perimeters for exposed services.
Analysis of the reported data reveals that all 2,258 documented incidents from 20 independent honeypot sensors classify the activity as port-scanning operations, specifically targeting Cisco ASA firewall appliances. The IP routes through AS59711 (HZ Hosting Ltd), a Netherlands-based hosting provider, placing the infrastructure within a commercial hosting environment commonly associated with ephemeral threat actors. The reporting window spans approximately two months, indicating persistent rather than opportunistic scanning behaviour. Despite the high report volume, the activity frequency metric of 0/10 suggests the scanning may occur in periodic bursts rather than continuous traffic, potentially to evade detection thresholds.
Port-scanning activity represents the initial phase of a targeted attack chain, wherein adversaries systematically enumerate open services and vulnerabilities on exposed systems to inform subsequent intrusion attempts. The specific focus on Cisco ASA appliances indicates deliberate reconnaissance against network edge devices, which are high-value targets due to their privileged position controlling inbound and outbound traffic. A successful scan could reveal outdated firmware, misconfigured access-control rules, or unpatched vulnerabilities that could be exploited for unauthorized network access, data exfiltration, or establishing persistent footholds within protected environments.
Network defenders should treat this IP as a hostile reconnaissance source and implement proactive countermeasures. Deploying stateful firewall rules to deny inbound connections from untrusted networks, implementing geoblocking where business requirements permit, and configuring intrusion-detection systems to flag scanning patterns from this address block are immediate steps. Monitoring authentication logs for brute-force attempts following reconnaissance, applying vendor-released patches for Cisco ASA vulnerabilities, and hardening exposed services by restricting access to essential ports only will reduce the attack surface that port-scanning activity seeks to exploit. Automated tools such as fail2ban can further mitigate repeated probe attempts by dynamically updating firewall rules.
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