User manual

Advanced DNS
Cobalt RaQ 4 User Manual 185
Delegating a subdomain
DNS servers are organized hierarchically. You can delegate the name server
authority for subdomains of any domain served by the RaQ 4 to other name
servers.
For example, domain.com can be served authoritatively by a RaQ 4 by defining
an 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. On the Server Management screen, click Control Panel. The Service
Settings table appears.
2. Click Parameters next to the DNS service in the Service Settings table.
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 fully qualified domain name(s) of the
DNS server(s) that will be authoritative for that subdomain.
6. Click Save Changes.
7. Click Save Changes to DNS Server.
255.255.255.240 28
255.255.255.248 29
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Important: Always click Save Changes to DNS Server after
modifying DNS records. If you do not, the changes will not take
effect.
Table 6. Network Mask Notation Conversion
Dot-Quad Bit count