Firewall Enhancement Dynamic threat blocklists
Protect your perimeter with dynamic blocklists. Automatic updates ensure your firewall blocks the latest threats without manual intervention.
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Threats Your Firewall Would Block
Active blocklist categories available as auto-updating firewall feeds.
Current data sample
29 075 995
Total threats
19 749 030
Malicious domains
9 326 965
Malicious IPs
591
Sources in the corpus
No credit card required · Free: a 10% sample of each list · full lists on paid plans
29M+
Active IOCs
5min
Update Cycle
10+
Vendors
Weighted
Source Reliability
Key features.
Available signals and integration options.
Multi-Vendor Support
Works with Palo Alto, Fortinet, Check Point, Cisco, Sophos, and any firewall that accepts external blocklists.
Automatic Updates
Blocklists update every 5-15 minutes automatically.
IP Blocklists
Malicious IPs including C2, scanners, and botnets.
Domain Blocklists
Phishing, malware, and spam domains.
Custom Categories
Choose specific threat categories to block.
Team exceptions
Whitelist false positives from your Team dashboard.
Use cases.
Workflows to evaluate with your existing tools.
Perimeter Defense
Block known bad actors at the network edge.
C2 Prevention
Stop malware from communicating with C2 servers.
Phishing Protection
Block access to phishing and scam sites.
Compliance
Document threat blocking for audit requirements.
Strengthen Your Firewall with Dynamic Threat Data
Traditional firewall rules rely on static blocklists that quickly become outdated. Attackers constantly rotate infrastructure, register new domains, and move to new IP addresses. A blocklist from yesterday may miss today's threats. Our dynamic blocklists update automatically with new threat indicators, ensuring your firewall is always blocking the latest malicious infrastructure. No manual updates, no gaps in protection.
Multi-Vendor Firewall Support
Our blocklists work with the firewalls you already have: - **Palo Alto Networks**: External Dynamic Lists (EDL) format with automatic refresh - **Fortinet FortiGate**: External blocklist feeds for FortiOS - **Check Point**: Threat prevention feeds and custom IOC lists - **Cisco**: Compatible with Cisco FTD and ASA external feeds - **Sophos**: Direct integration with Sophos Firewall - **Generic HTTP**: Standard text format for any firewall supporting URL-based blocklists Integration typically takes minutes - just point your firewall at our feed URL.
Curated Blocklists by Threat Category
Not all threats are equal, and not all networks have the same needs. Choose the blocklists relevant to your environment: - **Malware Distribution**: Domains and IPs hosting malware payloads and droppers - **Command & Control (C2)**: Infrastructure used by malware to receive instructions - **Phishing**: Fake login pages and credential theft sites - **Cryptomining**: Mining pools and cryptojacking scripts - **Spam Infrastructure**: Mail servers and domains associated with spam campaigns - **Scanner/Attackers**: IPs actively scanning for vulnerabilities Mix and match categories or use our comprehensive "all threats" list.
Low False Positive Rates You Can Trust
Blocking legitimate traffic is worse than blocking nothing. Our blocklists are curated for accuracy: - **Multiple Source Validation**: We require multiple independent sources before listing - **Confidence Scoring**: Only high-confidence indicators make it to blocklists - **Active Monitoring**: We continuously verify that listed indicators are still malicious - **Fast Delisting**: Report false positives at ismalicious.com/delist — we investigate and remove quickly - **Team exceptions**: Maintain false-positive exclusions for your team feeds Our false positive rate is below 0.01% across millions of indicators.
Frequently asked questions.
Which firewalls do you support?
How often are blocklists updated?
What types of blocklists are available?
Can I whitelist false positives?
Related articles.
Learn more from our security research blog.
Ready to get started?
Test the available signals in your workflow. Review the sources and limits before integrating.
No credit card required · Free API key