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Sidewinder G2 6.1.2 Administration Guide - Glossary of Technical ...

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Adding a new<br />

forward lookup<br />

entry<br />

Chapter 11: DNS (Domain Name System)<br />

Configuring hosted DNS servers<br />

• Entry MX Records: This field is used to specify entries in the Mail<br />

Exchangers table for the selected host. The Mail Exchangers table<br />

contains DNS MX records that indicate what machines will act as mail<br />

routers (mail exchangers) for the selected host. To add or delete an MX<br />

record entry use the New or Delete buttons, respectively. See “Adding<br />

an MX record” on page 332 for details on adding a new MX record entry.<br />

• HINFO-Type: This field provides information about a host’s hardware<br />

type.<br />

• HINFO-OS: This field provides information about a host’s operating<br />

system.<br />

Important:For security reasons, many organizations elect not to use the<br />

HINFO fields.<br />

5 Click the Save icon in the toolbar to save your changes.<br />

This window is used to define a new host for a forward lookup zone. Follow the<br />

steps below.<br />

Note: The following fields collectively define an Address record.<br />

1 In the Entry Name field, specify the host portion <strong>of</strong> the fully-qualified domain<br />

name <strong>of</strong> this entry.<br />

2 In the A Record IP field, specify a DNS A record (an Address record), which<br />

is used to map host names to IP addresses. The address you specify must<br />

be entered using standard dotted quad notation (for example<br />

172.14.207.27). This field and the CNAME Rec field are mutually exclusive.<br />

3 In the CNAME Rec field, specify a DNS CNAME record, which is used to<br />

map an alias to its canonical name. The name you specify must be entered<br />

using the fully-qualified primary name <strong>of</strong> the domain. This field and the A<br />

Record IP field are mutually exclusive.<br />

4 [Optional] In the TXT Record field, enter comments or additional information<br />

about this zone, such as sender ID information.<br />

5 [Optional] The Entry MX Records field lists entries in the Mail Exchangers<br />

table for this host. The Mail Exchangers table contains DNS MX records<br />

that indicate what machines will act as mail exchangers for the host. To add<br />

or delete an MX record entry use the New or Delete buttons, respectively.<br />

See “Adding an MX record” on page 332 for details on adding a new MX<br />

record entry.<br />

6 [Conditional] The HINFO-Type: field provides information about a host’s<br />

hardware type.<br />

7 [Conditional] The HINFO-OS field provides information about a host’s<br />

operating system.<br />

Important:For security reasons, many organizations elect not to use the<br />

HINFO fields.<br />

335

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