216.151.138.148📋 Copy

# IP Intelligence Briefing: 216.151.138.148

Classification: Moderate Risk Infrastructure IP

Analysis Date: Current

Risk Score: 40/100

## Executive Summary

IP address 216.151.138.148 belongs to Cisco Webex LLC (ASN 13445) and is geolocated to San Jose, California. The IP presents moderate risk (score 40) with no open services detected. While the immediate threat profile shows limited malicious activity, neighborhood analysis indicates mixed risk distribution within the /24 subnet.

## Infrastructure Profile

## Threat Indicators

• Current Risk Score: 40 (Moderate)
• Known Campaigns: None identified
• Tor Exit Node: No
• Known Attacker: No
• Spam Source: No
• Blacklist Status: Listed on 1 DNSBL (of 8 total checks)
• Abuse Confidence: Not quantified in current profile

## Neighborhood Analysis

Subnet: 216.151.138.148/24

Key Observation: The subnet shows heterogeneous risk distribution with 73 medium-risk IPs and 27 low-risk IPs, despite the target IP scoring 40. This suggests the risk is isolated to specific addresses rather than subnet-wide.

## Observation History

Total Observations: 57

Recent signals indicate:

• Subnet Classification: Mostly Clean (abuse density 0.168)
• ASN Confirmation: Cisco Webex LLC, US (ARIN)
• Threat Pulses: 50 pulses detected in AlienVault OTX feeds
• DNSBL Status: Listed on 8 total lists (0 currently listed - potential data lag)

## Relationship Graph

Total Relationships: 173

• Primary Type: Same Network (CS-1711 - 168+ entries)
• No External Organization/Hostname Links: None identified
• Certificate Associations: None detected

## Recommended Security Actions

Despite moderate risk scoring, automated recommendations suggest blocking due to DNSBL presence and neighborhood risk factors.

Recommended Firewall Rules:

```bash

# iptables

iptables -A INPUT -s 216.151.138.148 -j DROP

# nftables

nft add rule inet filter input ip saddr 216.151.138.148 drop

# nginx

deny 216.151.138.148;

# pfSense

216.151.138.148/32

# Cloudflare WAF

ip.src eq 216.151.138.148 → Block

# AWS WAF

Addresses: [216.151.138.148/32]

```

## Analyst Recommendations

1. Monitor, Don't Block Immediately: The IP shows moderate risk (40) with no active attack indicators. The Cisco Webex association suggests legitimate infrastructure.

2. Review DNSBL Listings: Investigate the 1 DNSBL listing to determine if it affects legitimate Webex traffic or represents a false positive.

3. Subnet Context: The /24 subnet shows mixed risk (73 medium, 27 low). Evaluate traffic patterns from related IPs in the 216.151.138.0/24 range.

4. Behavioral Monitoring: No honeypot hits, enumeration strikes, or WAF violations observed. Establish baseline traffic patterns for this ASN.

5. Historical Trend: 57 observations with stable ownership (0 changes). Threat persistence days: 0. No indication of escalating risk.

Final Assessment: Monitor for 7-14 days. Block only if traffic patterns indicate abuse or if DNSBL listing is confirmed as malicious. The IP appears to be legitimate Cisco infrastructure with elevated risk scoring due to neighborhood proximity to other flagged addresses.

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