51.161.65.188📋 Copy

# INTELLIGENCE BRIEFING: 51.161.65.188/32

Classification: MODERATE RISK | Provider: OVH | Report Date: 2026-06-15

---

## EXECUTIVE SUMMARY

IP 51.161.65.188 is a cloud infrastructure address associated with OVH hosting under customer network OVH-CUST-281059690. The IP resolves to hostname proxy-ca011-san188.ahrefs.net and carries a moderate risk score of 40. While the IP itself shows no direct threat indicators, it resides within a subnet exhibiting high abuse density (0.7188), with 184 of 256 total sibling IPs flagged as threats.

---

## OWNERSHIP & INFRASTRUCTURE

---

## GEOLOCATION ANALYSIS

Reported Location: Singapore (CA)

Geolocation Validity: ❌ INVALID

Critical geolocation discrepancy detected:

• Claimed Distance: 6,082 km from observation point
• Observed RTT: 27.0ms (minimum possible: 121.6ms)
• Validation Status: Violation detected — observed RTT is below physical minimum for claimed distance
• Conclusion: Geolocation data unreliable; actual location cannot be verified through current measurements

---

## THREAT ASSESSMENT

Current Risk Profile

• Risk Score: 40 (Moderate)
• Abuse Confidence Score: Not available
• Blacklist Count: 0
• Threat Feeds: None
• Known Campaigns: None
• Tor Exit: No

Direct Threat Indicators

• IsKnownAttacker: False
• IsSpamSource: False
• IsTorExit: False
• DNSBL Listed: 1 of 8 total lists
• Operator Score: 0.2174 (Minimal)

---

## NETWORK NEIGHBORHOOD INTELLIGENCE

Subnet: 51.161.65.0/24

Abuse Density: 0.7188 (HIGH ABUSE)

Assessment: The /24 subnet demonstrates significant abuse activity. While the target IP (51.161.65.188) maintains a moderate risk score, the neighborhood context suggests elevated baseline threat levels in this IP block.

---

## DNS & SERVICE ANALYSIS

Assessment: IP appears firewalled with no active services responding to common ports. No SSL/TLS certificates detected.

---

## OBSERVATION HISTORY (Last 19 Observations)

Recent Signals:

1. Subnet Abuse Density (2026-06-15 21:52:52 UTC) — Confidence 0.75: High abuse classification maintained

2. Geolocation Test (2026-06-15 21:52:40 UTC) — Confidence 0.30: RTT validation failure confirmed

3. Ownership Analysis (2026-06-15 21:47:22 UTC) — Confidence 0.85: No ownership changes detected

4. Threat Lists (2026-06-15 21:45:45 UTC) — Confidence 0.20: No attacker classification

5. Control Plane (2026-06-15 21:45:36 UTC) — Confidence 0.60: Minimal operator score

Temporal Analysis:

• Threat Persistence Days: 0
• Is Persistently Malicious: False
• Ownership Changes: 0
• Threat Observation Count: 1

---

## RELATIONSHIP GRAPH

Total Relationships: 35

Primary Relationship Type: Same Network (OVH-CUST-281059690)

All relationships map to the same customer network block, indicating concentrated hosting activity within this OVH customer network. No cross-organization or external entity relationships detected.

---

## RECOMMENDED SECURITY ACTIONS

Based on risk profile and neighborhood context, the following firewall rules are recommended:

iptables

```bash

iptables -A INPUT -s 51.161.65.188 -j DROP

```

nftables

```bash

nft add rule inet filter input ip saddr 51.161.65.188 drop

```

nginx

```nginx

deny 51.161.65.188;

```

pfSense

```

51.161.65.188/32

```

Cloudflare WAF

```json

{

"description": "Block 51.161.65.188 — IPDebrief risk score 40",

"action": "block",

"filter": {

"expression": "ip.src eq 51.161.65.188"

}

}

```

AWS WAF

```json

{

"Addresses": ["51.161.65.188/32"],

"Description": "IPDebrief risk 40"

}

```

Note: These recommendations are probabilistic and should be combined with additional threat intelligence signals before implementing blocking actions.

---

## ANALYST NOTES

1. **

2. Subnet Context: While the IP itself shows no direct malicious indicators, the high abuse density of the parent subnet (0.7188) suggests this IP block may be utilized for legitimate hosting alongside compromised or misconfigured systems.

3. Geolocation Discrepancy: The RTT violation indicates the geolocation database may be inaccurate. Do not rely on claimed Singapore location for physical proximity assessments or jurisdictional analysis.

4. No Active Services: The lack of open ports and HTTP/TLS responses suggests the IP is either firewalled, in a dormant state, or configured as a backend with no direct client-facing services.

5. Single DNSBL Entry: One of eight DNSBL lists shows this IP, indicating at least one security feed has flagged it. Consider reviewing which specific feed triggered the listing for additional context.

---

## CONCLUSION

IP 51.161.65.188 presents a moderate risk profile with no direct threat indicators observed. However, the high abuse density of the parent subnet warrants monitoring. The geolocation data is unreliable and should not be used for physical location verification. Recommended actions include defensive blocking if risk tolerance permits, with priority given to correlating with additional threat intelligence before implementing restrictive firewall rules.

---

## SIGNATURE

Analyst: Automated IP Intelligence System

Platform: IPDebrief Intelligence Suite

Generated: 2026-06-15T21:52:52+00:00

Classification: DEFENSIVE SECURITY INTELLIGENCE

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*This briefing is produced for authorized defensive security analysis only. All data sources and methodologies comply with applicable cybersecurity standards and defensive intelligence protocols.*

This summary was generated by AI and may contain inaccuracies. Verify critical details independently.