Juniper Networks has forked out $95m (£60.6m) to acquire virtualisation security vendor Altor Networks, net of shares that it already owns in the business.
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The two companies already have a technology partnership, but Juniper has ambitions to build out its network security business to cover the recent growth in virtual servers and cloud-based environments.
"This acquisition will extend our leadership in data centre and cloud security and will enable customers to deploy a consistent set of security services across their physical and virtual infrastructure, while delivering lower TCO," said Juniper Service Layer Technologies executive vice president and general manager Mark Bauhaus.
Altor, which was founded in 2007 and claims to have been the first vendor to develop a purpose-built firewall for virtual networks, specialises in government markets in its native US, as well as the retail and education sectors.