A Look into Cisco Umbrellaâs Secure Internet Gateway A Look into Cisco Umbrellaâs Secure Internet Gateway Umbrella - SIG - A Look into Cisco Umbrellas Secure Internet Gateway - English Take a deep dive into all security services provided by Cisco's Umbrella, Cisco's Secure Internet Gateway. This video illustrates how Umbrella enables branch transformation, increases security posture with leading DNS-layer (added layer) protection, allows for secure XaaS adoption and supports customers' cloud-first strategies. Vendor: Download this Video! This email address doesnât appear to be valid. Please provide a Corporate E-mail Address. This email address is already registered. Please login.