Severe Risk
IP 5.181.86.188 is a high-risk Ukrainian address with a threat level of 10 out of 10 that has been flagged for active reconnaissance activity, specifically sustained port-scanning behavior targeting exposed network infrastructure across 261 reported incidents.
Automated honeypot sensors recorded 20 recent port-scan detections from this single IP address, representing the dominant threat category over the reporting window spanning April to May 2026. The address originates from Ukrainian network space operated by Internet Solutions & Innovations LTD. under autonomous system AS211632. With a confidence score of 93% and an activity frequency rated 8 out of 10, the detection consensus is exceptionally strong. The sustained volume of reports within a compressed timeframe indicates deliberate, persistent reconnaissance rather than incidental traffic. Community-driven threat feeds and automated sensor networks both contributed to the reporting corpus, establishing a robust evidentiary foundation for the assessment.
Port scanning constitutes the primary threat vector observed from IP 5.181.86.188. This activity involves systematic enumeration of open network services on target systems, probing for accessible ports and protocols as a precursor to exploitation. Attackers leverage port-scan data to identify vulnerable services, map network topology and determine which attack surfaces warrant further intrusion attempts. The Ciscoasa-style probe patterns detected suggest the scanning is specifically targeting network security appliances and perimeter devices, indicating a sophisticated adversary focused on identifying misconfigurations or exploitable interfaces in perimeter defenses.
Site operators should treat this IP address as a confirmed hostile source and implement immediate blocking at the network edge. Deploying firewall rules or intrusion prevention systems to drop traffic from this address and monitor for subsequent probes from adjacent network ranges is recommended. Reducing the exposed attack surface by closing unnecessary ports and services limits the utility of any reconnaissance conducted. Implementing brute-force mitigation tools such as fail2ban or equivalent authentication-hardening solutions on exposed services reduces the likelihood of follow-on compromise. Continuous monitoring of honeypot telemetry and community threat feeds will help track whether the scanning activity persists or shifts to alternative infrastructure.
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