Cisco plans to buy IronPort, a developer of web and email security products, for $830 million (£195.3m), according to media reports citing Cisco executives.
IronPort offers a range of appliances that enterprises use to protect their networks from internet threats. Its appliances also help secure email services for internet service providers (ISPs). It also sells a security management appliance that offers enterprises a single location to manage, store and monitor corporate policies.
The acquisition also follows several other smaller buys for Cisco during 2006, including Tivella, an IP video company and Meetinghouse Data Communications, a wireless security vendor.
The acquisition of IronPort is expected to close in July, the reports said.