171.225.203.168📋 Copy

# INTELLIGENCE BRIEFING: 171.225.203.168/32

Classification: Moderate Risk

Date: 2026-07-23

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## EXECUTIVE SUMMARY

IP address 171.225.203.168 is associated with Viettel Vietnam (ASN 7552) and registers a moderate risk score of 40. The IP is classified as a residential broadband subscriber with firewalled/no services detected. No active threat indicators, known campaigns, or malicious blacklist entries are present. The subnet (171.225.203.0/24) demonstrates clean abuse density with minimal neighboring threats.

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## OWNERSHIP & GEOLOCATION

Geolocation Consensus: Multi-signal inference indicates location in Vietnam with 600km accuracy radius. Reverse DNS resolves to dynamic-adsl.viettel.vn, consistent with residential ISP subscriber address.

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## THREAT ASSESSMENT

Threat Indicators: No active threat indicators observed. No correlation with known malicious campaigns or C2 infrastructure.

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## NETWORK CLASSIFICATION

• Infrastructure Type: Residential/ISP Subscriber
• Service Status: Firewalled / No Services Detected
• Cloud Provider: No
• CDN/Proxy/VPN: No
• Mobile Carrier: No
• Bogon Address: No

Control Plane: Route stability flag is false; DNSSEC valid. Two DNSBL listings detected across 8 total lists analyzed.

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## TEMPORAL ANALYSIS

Observation History: 17 total signals observed, most recent activity 2026-07-23. No significant risk escalation detected. IP not flagged as persistently malicious.

Ownership Stability: No ownership changes recorded. Threat persistence days: 0.

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## NEIGHBORHOOD ANALYSIS (171.225.203.0/24)

• Abuse Density: 0 (Clean)
• Total Siblings: 2
• Active Siblings: 0
• Threat Siblings: 0
• Neighbor Risk: Null (171.225.203.190)

The subnet demonstrates no inherited risk from neighboring addresses.

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## RELATIONSHIP GRAPH

No external or malicious relationships identified.

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## RECOMMENDED ACTIONS

Risk Level: 40 (Moderate)

Actionable Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 171.225.203.168 -j DROP

# nftables

nft add rule inet filter input ip saddr 171.225.203.168 drop

# nginx

deny 171.225.203.168;

# pfSense

171.225.203.168/32

# Cloudflare WAF

{"description":"Block 171.225.203.168 — IPDebrief risk score 40","action":"block","filter":{"expression":"ip.src eq 171.225.203.168"}}

# AWS WAF

{"Addresses":["171.225.203.168/32"],"Description":"IPDebrief risk 40"}

```

Recommendations: No specific recommendations beyond standard risk-based blocking. Correlate with internal traffic patterns before implementing blocking rules.

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## SOC ANALYST NOTES

• IP represents residential broadband subscriber from Viettel Vietnam ISP
• No active malicious activity or threat indicators observed
• Moderate risk score driven by residential classification and DNSBL presence
• Recommended for monitoring rather than immediate blocking
• Consider geo-blocking or rate-limiting based on organizational security policy
• No actionable IOCs or threat intelligence indicators extracted

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End of Briefing

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