43.203.128.219📋 Copy

# IP Intelligence Briefing: 43.203.128.219/32

Classification: Moderate Risk Cloud Infrastructure

Date: Current Intelligence Cycle

Analyst: IPDebrief Automated Intelligence System

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## Executive Summary

Target IP 43.203.128.219 is an Amazon Web Services EC2 instance located in the ap-northeast-2 (Seoul, South Korea) region. The IP carries a moderate risk score of 55/100, primarily driven by DNSBL listings (3 of 8 lists). No active threat indicators, known campaigns, or malicious activity were detected during analysis. Infrastructure appears legitimate despite elevated risk scoring.

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## Ownership and Infrastructure Profile

DNS Resolution:

• PTR Hostname: `ec2-43-203-128-219.ap-northeast-2.compute.amazonaws.com`
• Forward Resolution: Confirmed
• Domain: amazonaws.com
• SPF/DMARC: Present

Services Identified:

• Port 22/TCP: SSH (OpenSSH 8.9p1 Ubuntu-3ubuntu0.15)

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## Geolocation Analysis

Control Plane Data:

• Origin ASN: 16509
• BGP Prefix: 43.200.0.0/14
• AS Path: 2914 16509
• RPKI State: Valid
• Route Stability: Unstable (1 route change in 30 days)
• Delegation Age: 9,583 days

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## Threat Assessment

Threat Indicators: None detected

Campaign Correlation: None

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## Neighborhood Analysis (43.203.128.0/24)

Assessment: No neighboring IPs show malicious activity. Subnet is classified as clean with zero abuse density.

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## Historical Observation Summary

Total Observations: 22

Key Historical Signals:

• Route origin validation: Valid (local VRP)
• ASN ownership: Stable (allocated 2000-05-04)
• Geolocation inference: Seoul, KR (confidence 0.56)
• Threat persistence: None detected
• Ownership changes: 0

Temporal Analysis: No evidence of persistent malicious behavior. IP has maintained stable ownership throughout observation period.

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## Relationship Graph

Assessment: Standard AWS infrastructure relationships. No suspicious external associations.

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## Recommended Actions

Risk-Based Recommendations:

1. Monitoring Priority: HIGH — Due to elevated risk score (55/100)

2. Action: Increase logging verbosity and review recent activity from this IP

Firewall Rules (if blocking warranted):

• iptables: `iptables -A INPUT -s 43.203.128.219 -j DROP`
• nftables: `nft add rule inet filter input ip saddr 43.203.128.219 drop`
• nginx: `deny 43.203.128.219;`
• pfSense: `43.203.128.219/32`
• Cloudflare WAF: Block IP (filter expression: `ip.src eq 43.203.128.219`)
• AWS WAF: Add to block list (CIDR: 43.203.128.219/32)

Note: Blocking recommended based on risk score alone. No active threat indicators present. Consider whitelisting if this is expected traffic from AWS infrastructure.

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## Intelligence Narrative

Target 43.203.128.219 presents a moderate risk profile typical of cloud infrastructure with mixed reputation signals. The IP resolves to an AWS EC2 instance in Seoul, South Korea, with legitimate DNS infrastructure and no direct threat indicators. The moderate risk score (55/100) appears driven by DNSBL listings rather than observed malicious activity. The /24 neighborhood shows zero abuse density, indicating this is not part of a larger malicious network.

Key Observations:

• Legitimate AWS cloud infrastructure with

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