The security solutions, which will be managed from London and Glasgow, will provide staff in more than 70 global offices with functionality such as secure video conferencing and remote access.
The move is part of DFID's strategy to provide high availability and business continuity for its offices and remote workers.
"[These] solutions were evaluated with strict government rules on the use of certified products and budget constraints in mind," said Tony Armstrong, DFID technical systems advisor. "We found them to meet every requirement. We are seeing major benefits with the management interface which enables the infrastructure to be centrally managed and saves us administration time."
Assurix, an IT security consultancy, will assist DFID with the implementation.
DFID is in the process of implementing Check Point's VPN-1 for site-to-site connectivity and VPN-1 SecureClient to enable employees to work remotely or from home.
The DFID participates in promoting sustainable development in third world countries.