User manual

Basic DNS
Cobalt RaQ 4 User Manual 181
8. Click Update List.
9. Click Save Changes to DNS Server.
Specifying a reverse lookup (PTR) record
A DNS server can also resolve a computer host name to an IP address, which is
known as reverse lookup. The network mask, or subnet size, is specified by an
integer from 8 to 32.
See Table 6.
To specify a reverse lookup (PTR) record:
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 Reverse Lookup (PTR) from the Add... pull-down menu.
4. Enter the host name and domain name you want to serve (for example, www
and mydomain.com) and enter its IP address (for example, 192.168.1.1) and
network mask (for example, 24).
5. Click Update List.
6. Click Save Changes to DNS Server.
Specifying a mail server (MX) record
To specify a mail server (MX) record:
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 Mail Server (MX) from the Add... pull-down menu.
4. Enter the host name and domain name you want to serve (for example, www
and mydomain.com) and enter its IP address (for example, 192.168.1.1) and
network mask (for example, 24).
5. In the Delivery Preference field, you can choose from the pull-down menu
Very Low, Low, High or Very High.
6. Click Update List.
7. Click Save Changes to DNS Server.