User manual

Appendix E: Domain Name System
252 Cobalt RaQ XTR User Manual
Delegating a subdomain
DNS servers are organized hierarchically. You can delegate the name-server
authority for subdomains of any domain served by the RaQ XTR to other name
servers.
For example, domain.com can be served authoritatively by a RaQ XTR by
defining a Forward Address (A) Record using that domain. A subdomain, such as
remote.domain.com, can use its own set of DNS servers so that domain authority
can be shared between multiple physical sites. This makes it easier to use
multiple DNS servers in remote locations sharing a common domain.
To delegate the subdomain naming authority to another name server:
1. Select Server Management > Control Panel. The “Service Settings” table
appears.
2. Click the green pencil icon next to the DNS service in the “Service Settings”
table. The “DNS Settings for <sitename>” table appears.
3. Select the parent domain from the Select Domain or Network... pull-down
menu.
4. Select Delegate Subdomain from the Add... pull-down menu.
5. Specify the subdomain name and the qualified host name(s) of the DNS
server(s) that will be authoritative for that subdomain.
6. Click Save Changes.
7. Click Save Changes again.
255.255.255.240 28
255.255.255.248 29
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Important: Always click Save Changes after modifying DNS
records. If you do not, the changes will not take effect.
Table 2. Network Mask Notation Conversion
Dot-Quad Bit count