 Before 2007 OpenDNS was using the DNS Update API from DynDNS to handle updates from users with dynamic IPs.In June 2007 OpenDNS started advanced web filtering to optionally block "adult content" for their free accounts.Nand Mulchandani, former head of VMware's security group, left VMware to join OpenDNS as new CEO in November 2008, replacing founder David Ulevitch, who remained as the company's chief technology officer.