The Center for Internet Security (CIS®) introduces Malicious Domain Blocking and Reporting Service

As local governments look to strengthen the security of their IT systems against malware, especially with the upcoming election, CIS and DHS are offering an effective, no-cost solution through a new security service available to local and state government partners.

Alliance for Innovation members who are U.S. State, Local, Tribal, and Territorial (SLTT) government entities and part of the Multi-State Information Sharing and Analysis Center® (MS-ISAC®) or Elections Infrastructure Information Sharing and Analysis Center® (EI-ISAC®) can take advantage of the Malicious Domain Blocking and Reporting (MDBR) service. Offered through a partnership between CIS, the Department of Homeland Security (DHS) Cybersecurity and Infrastructure Security Agency (CISA) and Akamai, this service is available to SLTT organizations at no cost and provides an additional layer of cybersecurity protection that is proven, effective, and easy to deploy.

About MDBR

MDBR proactively prevents IT systems from connecting to harmful web domains, which dramatically limits infections related to known malware, ransomware, phishing, and other cyber threats. MDBR doesn’t just warn your organization, it actually blocks traffic to known malicious domains. In just the first three months of service, the MDBR service blocked more than 323 million malicious requests from over 550 SLTT entities.

Once an organization points its domain name system (DNS) requests to the Akamai’s DNS server IP addresses, every DNS lookup will be compared against a list of known and suspected malicious domains. Attempts to access known malicious domains, such as those associated with malware, phishing, and ransomware, among other threats, will be blocked and logged. CIS will then provide weekly reporting for each user that includes their DNS activity, blocked malicious domains, threat events, and other relevant data, and assist in remediation if needed. The service requires virtually no maintenance as CIS and Akamai fully maintain the systems required to provide the service.

How MDBR Works

MDBR Flow Chart

How to Sign Up

As U.S. city and county governments, any Alliance for Innovation members who are already MS-ISAC members are eligible to sign up for the MDBR service at absolutely no cost, thanks to funding provided by DHS. For any Alliance for Innovation member that isn’t an MS-ISAC member, signing up for membership is simple and provides a variety of other valuable cybersecurity benefits on top of MDBR, including access to CIS’s 24x7x365 Security Operations Center, threat notifications and advisories, incident response services, and more — all at no cost.

To Learn More about MDBR:

How to Sign Up:


To Learn More about MS-ISAC Membership:

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