User manual

Contents
Cobalt RaQ XTR User Manual xix
E Domain Name System 245
Basic DNS 245
Enabling the DNS server feature 246
Configuring a primary DNS server 246
Specifying a Forward Address (A) record 247
Specifying a mail server (MX) record 248
Specifying an alias (CNAME) record 249
Configuring a secondary DNS server 249
Adding a secondary domain 250
Adding a secondary network 250
Advanced DNS 251
Network Mask Notation Conversion 251
Delegating a subdomain 252
Delegating a subnet 253
Configuring server settings 253
Start of Authority (SOA) configuration 254
Name server (NS) 255
Domain administrator email address 255
Refresh interval 255
Retry interval 255
Expire interval 255
Time-to-live period (TTL) 255
Sample setup of DNS service 256
Reverse Address (PTR) record 257
Forward Address (A) record 258
Mail Server (MX) record 259
Brief history of the Domain Name System (DNS) 260
What is a DNS record? 261
Who manages your DNS records? 261
How does DNS work? 261