McAfee has agreed to buy network security specialist Secure Computing in a deal worth around $465m.

Secure Computing's products include Webwasher, a tool for filtering corporate web traffic; Ironmail encrypted mail servers; Sidewinder firewall appliances and SnapGear VPN (virtual private network) devices.

With the acquisition, McAfee hopes to expand its security-as-a-service offer, and to sell more products and services to Secure Computing's 22,000 customers worldwide. With its existing network security services, the company expects total network security sales of around $500m a year. In 2007, McAfee's revenue from all product lines totalled $1.3bn.

McAfee intends to make Secure Computing part of its network security business unit. The companies expect to close the deal around the end of the fourth quarter, subject to approval from stockholders and regulators.