DNS Firewall
Free Account
Everyone should be protected from the worst of the worst IP traffic at no cost. With Spamhaus’ Free DNS Firewall service, access DNS Response Policy Zones (RPZ) to automatically block IPs that have been identified as being hijacked, belonging to bullet proof hosters, or are being leased by professional malicious organizations.
Details of service
Usage Terms
Anyone can set up a free account and start using the data, at no cost. Terms of use related to this service can be viewed here.
System requirements
Technical documentation
Setting up an account
Datasets included
Sign up for
a free account
Enter your details below to access Spamhaus’ FREE DNS Firewall, and protect your network from the worst of the worst.


More free resources
Data Access
Spamhaus Technology provides free access to query the real-time DNS Blocklists (DNSBLs) on behalf of The Spamhaus Project (subject to Terms of Use). This is to enable small-scale users to safely filter their email at no cost.
Data Access
Integrate context-rich metadata relating to IP and domain reputation to enhance existing data feeds, or consume as an independent data source. Gain additional intelligence to monitor, assess and remediate as required.