Block ASN

Block traffic from specific Autonomous System Numbers to control access from entire network providers and organizations.

Real-time ASN Intelligence

Our system maintains an up-to-date database of ASNs and their associated networks, ensuring accurate detection and blocking of unwanted traffic.

Flexible Control

Create custom rules to block specific ASNs, filter by risk scores, or implement allow-listing for trusted network providers.

Example rules

Here are some example rules you can implement to block traffic based on ASN. These rules can be customized and combined to meet your specific needs.

Block Major Cloud Providers

Block traffic from major cloud hosting providers

block
GOOGLE-CLOUD, AMAZON-AWS, MICROSOFT-AZURE
equals

Expression preview

(asn.name equals "GOOGLE-CLOUD OR AMAZON-AWS OR MICROSOFT-AZURE")

Block Specific ASN

Block traffic from a specific ASN

block
AS15169
equals

Expression preview

(asn.number equals "AS15169")

Block High-Risk ASNs

Block traffic from ASNs known for malicious activity

block
80
greater_than

Expression preview

(asn.risk_score greater_than "80")

Why Block by ASN?

ASN blocking provides a powerful way to control traffic at the network provider level. This approach is particularly effective for:

  • Blocking entire ranges of IPs from problematic providers
  • Preventing automated attacks from cloud providers
  • Controlling access from specific network organizations
  • Implementing granular network-level security policies

Ready to get started?

Try our solution for free and see how it can help protect your application.

What's included

  • • Real-time IP intelligence
  • • Advanced rule builder
  • • Detailed analytics
  • • Support
  • • API access

Protect any endpoint

  • • Access control & authentication
  • • Login & registration forms
  • • Contact & support forms
  • • API endpoints
  • • User-generated content
  • • Payment & checkout pages

Block malicious activity based on IP addresses or email domains.