51.161.65.68📋 Copy

# IP INTELLIGENCE BRIEFING: 51.161.65.68/32

## Executive Summary

IP address 51.161.65.68 is a cloud-hosted infrastructure endpoint located in Montreal, Canada, operated by OVH under customer account OVH-CUST-281059690. The IP resolved to Ahrefs domain proxy infrastructure (proxy-ca011-san68.ahrefs.net) but presents no open services or active threat indicators. The subnet demonstrates elevated abuse density (0.51) with 127 of 249 sibling IPs flagged as threats.

## Technical Profile

## Threat Assessment

Current Risk Level: Moderate (Score: 40)

Threat Indicators:

• No active threat indicators detected
• Blacklist count: 0
• DNSBL listings: 1 of 8 total lists
• Not classified as Tor exit, VPN, proxy, or known attacker
• No correlation with known APT campaigns

Abuse Context:

The /24 subnet (51.161.65.0/24) shows high abuse density with 127 threat siblings identified out of 167 active IPs. This suggests the hosting environment may be compromised or underutilized for legitimate purposes.

## Observation History

Recent signal observations from June 2026 indicate:

• Ownership stability: No changes detected
• Threat persistence: 0 days
• Signal confidence: 0.60-0.90 across dimensions
• Classification: High abuse subnet inherited risk score of 20

## Network Relationships

The IP maintains 36 relationships, all classified as same network (OVH-CUST-281059690). No cross-organization or cross-ASN associations were identified.

## Recommended Actions

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

iptables:

```

iptables -A INPUT -s 51.161.65.68 -j DROP

```

nftables:

```

nft add rule inet filter input ip saddr 51.161.65.68 drop

```

nginx:

```

deny 51.161.65.68;

```

AWS WAF:

```

{"Addresses":["51.161.65.68/32"],"Description":"IPDebrief risk 40"}

```

## Intelligence Notes

• The IP resolves to Ahrefs proxy infrastructure, indicating potential legitimate SEO marketing use
• However, the high-abuse subnet context warrants monitoring despite lack of direct threat indicators
• Consider blocking at perimeter if the IP is not required for business operations
• Monitor for changes in risk score or emergence of threat indicators

Classification: Moderate Risk - Monitor Contextually

Last Updated: 2026-06-14

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