CIS Center for Internet Security

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Malicious Domain Blocking and Reporting

An additional layer of cybersecurity protection that is proven, effective, and easy to deploy offered at no-cost to MS-ISAC and EI-ISAC members in partnership with CISA and Akamai.

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CIS harnesses the power of a global IT community to safeguard public and private organizations against cyber threats.

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The MS-ISAC & EI-ISAC are focal points for cyber threat prevention, protection, response, & recovery for U.S. State, Local, Tribal, & Territorial government entities. CIS is the home of the MS-ISAC and EI-ISAC.

Malicious Domain Blocking and Reporting

An additional layer of cybersecurity protection that is proven, effective, and easy to deploy offered at no-cost to MS-ISAC and EI-ISAC members in partnership with CISA and Akamai.

Learn More

CIS harnesses the power of a global IT community to safeguard public and private organizations against cyber threats.

Join MS-ISAC

Join EI-ISAC

Start Secure, Stay Secure

A CIS SecureSuite Membership combines the CIS Benchmarks, CIS Controls, and CIS-CAT Pro into one powerful cybersecurity resource for businesses, nonprofits, and governmental entities.

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Consensus-developed secure configuration guidelines for hardening.

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Develop and update secure configuration guidelines for 14 technology groups.

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Prescriptive, prioritized, and simplified set of cybersecurity best practices.

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Refine and verify best practices, related guidance, and mappings.

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Start Secure. Stay Secure.^®

Membership combines and automates the CIS Benchmarks, CIS Controls, and CIS-CAT Pro into a powerful and time-saving cybersecurity resource.

CIS-CAT Pro enables users to assess conformance to best practices and improve compliance scores over time.

“It is the most important membership for the compliance review of information security available in the market today.”

— Senior Manager, Information Security & Compliance International Public Service & Communications Agency

Consensus-based Guidelines

CIS Benchmarks and CIS Controls are consensus-based guides curated by security practitioners focused on performance, not profit.

Objective Standards

Our security best practices are referenced global standards verified by an objective, volunteer community of cyber experts.

Secure Online Experience

CIS is an independent, non-profit organization with a mission to provide a secure online experience for all.

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What's New

Advisory • 05 Aug 2020

A Vulnerability in TeamViewer Cloud Allow for Offline Password Cracking

Media mention • 04 Aug 2020

Federal Program Offers New Cybersecurity Tool for Elections

Media mention • 04 Aug 2020

Experts Warn Mail-In Voting Misinformation Could Threaten Elections

Media mention • 04 Aug 2020

Experts Assure House Panel of US Election Security Improvements

Media mention • 04 Aug 2020

States Need Federal Help to Ensure Smooth Election, House Panel Is Told

Media mention • 04 Aug 2020

Disinformation is Biggest Threat to Election Security, Experts Tell Congress

Daily tip

Know the Rules of Cyber Ethics

"Cyber ethics" refers to the code of responsible behavior on the Internet. Just as we are taught to act responsibly in everyday life with lessons such as "Don't take what doesn't belong to you" and "Do not harm others," we must act responsibly in the cyber world as well. The basic rule is "Do not do something in cyberspace that you would consider wrong or illegal in everyday life." Click for more considerations.

Center for Internet Security®