Cisco to Buy OpenDNS for $635 Million to Boost Security Business Cisco Systems Inc said on Tuesday it would buy OpenDNS, a privately held cloud-based security firm, for $635 million (roughly Rs. 4,043 crores), the latest move to boost its security business as July 1, 2015 Business/Channel/IT Magazine/Magazine Advertisement india/Networking/New Feature/News/Product Launch/Technology News