This is a market research Sources Sought notice to identify vendors capable of proposing, delivering, and sustaining a ruggedized, field-deployable Next-Generation Firewall for the Air Force's Starshield project. The solution must be integrated into a transit case, operate in contested environments, and enable a Zero Trust security architecture. Responses must be submitted electronically as a no-cost submission with a maximum of 15 pages. The location for performance is not specified, and no budget information is provided.