PacNOG 21 Conference and Workshops 4th to 8th December 2017, Nuku'alofa, Tonga Track 1: Internet and IPv6 Infrastructure Security Workshop Instructors: Philip Smith (APNIC), Jessica Wei (APNIC) Track 2: Virtualisation and Cloud Computing Workshop Instructors: Hervey Allen (NSRC), Phil Regnauld (NSRC), Eugene Adanzo (Uni of Guam)