Edgecast Route (DNS) Administration Guide Disclaimer Care was taken in the creation of this guide. However, Edgecast cannot accept any responsibility for errors or omissions. There are no warranties, expressed or implied, including the warranty of merchantability or fitness for a particular purpose, accompanying this product. Trademark Information EDGECAST is a registered trademark of Verizon Digital Media Services Inc. About This Guide Route (DNS) Administration Guide Version 2.40 8/28/2021 ©2021 Verizon Media. All rights reserved. Table of Contents Route ............................................................................................................................................................. 1 Introduction .............................................................................................................................................. 1 Scope ......................................................................................................................................................... 1 Module Comparison ................................................................................................................................. 2 Managed (Primary) or Secondary DNS Module .................................................................................... 2 DNS Health Checks Module .................................................................................................................. 3 Billing Activation ....................................................................................................................................... 3 Terminology .............................................................................................................................................. 4 Primary Zone Management .......................................................................................................................... 7 Overview ................................................................................................................................................... 7 Zones & Domains ...................................................................................................................................... 7 Zone Components ................................................................................................................................... 13 DNS Zone Administration ........................................................................................................................ 14 Zone Creation/Modification ............................................................................................................... 14 Zone Deletion ...................................................................................................................................... 15 Record Administration ........................................................................................................................ 16 Zone Status ......................................................................................................................................... 24 Switching DNS Service Provider .............................................................................................................. 25 Vanity Name Servers ........................................................................................................................... 25 Route-Branded Name Servers ............................................................................................................ 27 DNS Health Checks ...................................................................................................................................... 28 Overview ................................................................................................................................................. 28 How Does It Work? ................................................................................................................................. 28 Configuration .......................................................................................................................................... 31 Health Check Status Information ............................................................................................................ 37 Firewall Access and Monitored Servers .................................................................................................. 38 Table of Contents Edgecast Page i User Agent .............................................................................................................................................. 38 DNS Load Balancing .................................................................................................................................... 39 Overview ................................................................................................................................................. 39 How Does It Work? ................................................................................................................................. 40 DNS & Load Balancing ......................................................................................................................... 40 Configuration .......................................................................................................................................... 45 Load Balancing Group Creation .......................................................................................................... 46 Load Balancing Group Modification.................................................................................................... 49 Load Balancing Group Deletion .......................................................................................................... 52 DNS Failover ................................................................................................................................................ 53 Overview ................................................................................................................................................. 53 How Does It Work? ................................................................................................................................. 53 Configuration .......................................................................................................................................... 56 Failover Group Creation ...................................................................................................................... 57 Failover Group Modification ............................................................................................................... 60 Failover Group Deletion ...................................................................................................................... 62 Secondary DNS ............................................................................................................................................ 63 Overview ................................................................................................................................................. 63 How Does It Work? ................................................................................................................................. 63 Initial Zone Transfer ............................................................................................................................ 64 Zone Synchronization .......................................................................................................................... 66 DNS Query Handling ........................................................................................................................... 67 Configuration .......................................................................................................................................... 68 Master Server Group Administration ................................................................................................. 69 Secondary Zone Group Administration .............................................................................................. 71 Secondary Zones ................................................................................................................................. 76 DNSSEC ................................................................................................................................................ 77 Zone Transfer Authorization ................................................................................................................... 78 Enabling Secondary DNS ......................................................................................................................... 79 Table of Contents Edgecast Page ii Route Introduction The Route solution provides a variety of offerings through which you can achieve reliable, high performance, and secure DNS service. This solution allows you to perform all of the following: • Manage a DNS zone. • Set up a secondary DNS zone. • Load balance traffic across servers. • Establish a failover system that prevents an interruption to site traffic when server(s) can no longer properly fulfill requests. • Verify a server's capability to fulfill requests through health checks performed from around the world. • Mitigate Distributed Denial of Service (DDoS) attacks on your servers by leveraging our distributed DNS network and technologies. Scope The purpose of this document is to provide information