Cobalt Digital Inc Cobalt NASRaQ Manuel d'utilisateur télécharger pdf (Page 165)

Domain Name System

151

7. You can enable Automatic Reverse Lookup Generation for this IP

address and host name pair so that IP address/host name pairs can

be resolved in both directions. Reverse lookup (PTR) records that

are generated automatically assume the network mask of

255.255.255.0 (24 bits.)

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 4 “Network Mask Notation Conversion.” on page 154.

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 your domain.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.

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Cobalt Digital Inc Cobalt NASRaQ Manuel d'utilisateur Page 165