Cisco is set to buy Meetinghouse Data Communications, an endpoint security software vendor.
Cisco claimed that the New Hampshire-based company would offer it the ability to "provide a single unified wired and wireless client for enterprise customers" without any unauthorised devices getting on a network.
Meetinghouse's AEGIS line of authentication software is used to manage network access using the IEEE 802.1x standard.
The acquisition will play into Cisco's strategy of integrating security management software into its hardware, an initiative it calls the Self-Defending Network, said Zeus Kerravala, vice president of enterprise infrastructure with Yankee Group Research.
"Cisco is always looking for things that make their security strategy stronger, " he said.
Privately held Meetinghouse was founded in 1988 by its current president, Paul Goransson, and has 77 employees.
Pending regulatory approvals, the purchase is expected to close by the end of October, at which point Meetinghouse will be absorbed into Cisco's Wireless Networking Business Unit, Cisco said.