Have you been blocked?
All blocklists are researched and managed by The Spamhaus Project.
Simply click on the link below, which will take you to the Project’s IP and Domain Reputation Checker. From here you will be able to enter your IP or Domain and begin your request for removal.
Please note that the Project’s IP and Domain Reputation Checker is the only place where removals are handled.
IT and security teams consistently face multiple business challenges. Discover how our solutions can help overcome some of those issues.
From processing issues, to email-borne threats our blocklists easily integrate with your current email set-up to improve anti-spam & anti-virus email filtering.
Employ our threat intelligence to increase visibility across security events, reveal potential weaknesses in your network, and threats to your brand.
Stay on top of the latest threats and proactively combat botnet infections, and other forms of abuse, with our solutions.
From clicking on phishing emails to visiting malware dropper sites, our threat intelligence provides automatic protection for your users.
Data for Integration
Enhance your service and create competitive advantage by integrating Spamhaus’ world-class IP and domain reputation data.
Our products provide additional layers of security for networks and email. They also present security teams with additional insight into malicious behavior.
Border Gateway Protocol (BGP)
Block the worst of the worst at your network edge, taking advantage of your existing BGP-capable routers. Configuration only takes minutes.
Data Query Service (DQS)
Benefit from industry-leading real time blocklists. These DNSBLs easily plug into your existing email infrastructure to block spam and other email threats.
A powerful research tool to investigate relationships between internet infrastructures. Quickly pivot to new areas of concern to rapidly investigate potential threats.
Immediately block connections to dangerous sites, including phishing and malware dropper websites. A ‘set and forget’ solution.
Spamhaus Intelligence API
Threat intelligence data in API format to enable users to easily integrate metadata relating to threats with their own applications, programs, and products.
A wide range of datasets, providing multiple layers of protection. They can be plugged directly into your existing hardware, making them an affordable choice.
Border Gateway Protocol (BGP) Feeds
Do Not Route Or Peer (DROP) and Botnet Controller List (BCL) datafeeds can peer with your existing BGP-capable router.
Domain (DBL), Zero Reputation (ZRD) and Hash blocklists (HBL) enable you to block content in emails, filtering out a higher rate of email-borne threats.
Data for Investigation
Passive DNS and extended datasets give you additional information on internet resources. They provide deeper insights into incidents and possible threats.
DNS Firewall Threat Feeds
A wide range of feeds to apply to your DNS recursive server. Choose the right level of protection for your organization.
Spam (SBL), Policy (PBL), Exploits (XBL) and Auth (AuthBL) blocklists allow you to filter email from IPs associated with spam, botnets, and other threats.
Find out more about us.
Learn more about Spamhaus; who we are, and what we do.
Find out who we work with and how you can become a Spamhaus Partner.
Discover a wide range of blog posts, case studies and reports.
Commonly asked questions about Spamhaus products and processes.
The Blocklist Tester
A tool to help you check if your servers are correctly configured to use Spamhaus DNSBLs.
The Reputation Portal
A tool for ASN owners to get visibility of their IPs’ reputation and proactively manage listings.
Help for the Project's legacy DNSBLs users
Using the Project’s legacy blocklists and suddenly experiencing email issues? This page may be able to help.
In depth information about the technical details and implementation of our products.
Posted by The Spamhaus Team on 29 Jun 2022
For Internet Service Providers, it’s a constant battle to deliver the internet resources requested by the customer, but also keep them protected against malicious behaviour. CitraNET have managed to overcome this challenge with the flexibility offered by DNS Firewall Threat Feeds, resulting in a dramatic decrease in network abuse complaints.
CitraNET is a local Indonesian Internet Service Provider (ISP) with over 20 years of experience serving corporate, residential, and public customers. In addition to providing connectivity via wireless and fiber optics, CitraNET also runs its own independent data center.
With so much experience, they are all too familiar with the quickly evolving threats that go hand-in-hand with the digital arena. Their approach focuses on constant innovation and finding reliable partners to support them in keeping their customers and network secure and protected.
ISPs are the gateway to the biggest source of information – and subsequently abuse – on the planet. If users are inadvertently able to connect to malicious sites, become a botnet, or send unwanted traffic, it’s not just the user who is at risk. The ISP’s network, service and consequently their reputation are on the line too.
But putting protection in place for users isn’t all that straightforward. How do you stop customers from engaging with malicious sites, when ultimately that means blocking them from freely accessing information? ISPs can face serious litigation charges if they get it wrong. It’s a tightrope walk.
After analyzing the market for different solutions, CitraNET landed on DNS Firewall as their preferred solution. Delivered in the industry-standard Response Policy Zones (RPZ) format, DNS Firewall allows you to choose and implement the protection policies according to your risk profile.
CitraNET, with such a broad audience, are risk-tolerant, so they chose the feeds that best suited their use case to ensure they were only preventing access to indisputably malicious activity. (You can find out more about choosing the right feeds here.)
Working with local Spamhaus partner, Pipeline, CitraNET set up a trial to ensure the solution was compatible with their systems internally and met their delivery requirements. Results were monitored via logs before fully deploying DNS Firewall.
Set up was simple – the team used existing hardware to implement, and all users became protected in one single deployment. The impact was seen almost immediately. As malicious communications were automatically blocked in real time at the DNS level, fewer network resources were required to keep users accessing the internet. The network performance increased in terms of speed and performance.
CitraNET finally had assurance that their users and network were appropriately protected against malware, phishing sites, malicious traffic, and more – with the bonus of not having to set any firewall rules manually.
In essence, this solution applies threat intelligence data to DNS resolver traffic to prevent DNS requests from resolving to known malicious IP addresses and domains. What do we mean by that?
When a user clicks on a URL link and queries their local DNS resolver, the DNS resolver checks against Spamhaus’ data – the DNS Firewall Threat Feeds. If the domain, IP, or nameserver is listed in one of the Feeds, the resolution of that link is blocked/redirected. If it is not listed, the user can access the link destination. This all happens in automatically in milliseconds making it a ‘set and forget’ solution.
The DNS Firewall Threat Feeds that Spamhaus makes available to customers range from “this IP is definitely bad – do not go near it” to “we are suspicious of this IP, so act with caution.” This places all of the control with CitraNET enabling them to choose the level of protection that meets their users’ needs.
The solution has been in place since 2020, and in this time, CitraNET has seen network abuse complaints decrease dramatically. Customers are not getting infected, so their abuse desk is dealing with a reduced number of support tickets. This has led to constraints on internal resources dropping, so much so that they have been able to relocate one resource, assisting with costs-savings.
Applied at the DNS level of your infrastructure, these threat feeds automatically stop users from accessing malicious sites including phishing and malware dropper websites.
These threat feeds can be integrated with existing recursive DNS servers, or for those who don’t manage their own DNS, we have a managed service available.
17 March 2019
When choosing DNS Firewall Threat Feeds its key to ensure you pick the right ones based on the relevant level of protection your business requires, otherwise you could be making things more tricky than they need to be.
11 September 2018
With such a huge growth in the DNS Firewall market over the past few years there are plenty of options to choose from. Read our Top 10 questions for your next DNS Firewall provider.
29 March 2018
Global managed cloud provider Rackspace is protecting customers and improving connectivity by using DNS Firewall threat feeds to block malicious domain traffic and botnet activity. Find out the challenges they were facing and how they overcame them.