The Defense Information Systems Agency (DISA) is seeking information from commercial vendors regarding a Cloud-Based Internet Isolation (CBII) service to enhance cybersecurity for the Department of Defense (DoD). This Request for Information (RFI) aims to conduct market research and evaluate potential vendors capable of providing a managed service that isolates non-government internet traffic, mitigating cybersecurity risks and relieving bandwidth constraints for approximately 3.6 million NIPRNET users. The desired service includes features such as destination whitelisting, web content filtering, malware scanning, and advanced threat detection and response capabilities. Additionally, the system must support mobility, comply with DoD security standards, and facilitate identity management through Public Key Infrastructure (PKI). DISA emphasizes the necessity of a robust test and incident management framework, along with customizable event management features. Respondents are invited to submit white papers detailing their solutions, training, implementation processes, and cost estimates. Notably, this RFI does not constitute a solicitation for proposals; its primary function is to gather industry insight for refining the government’s acquisition strategy and capabilities assessment regarding CBII services.