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

Adding a forward
lookup sub-domain
Chapter 11: DNS (Domain Name System)
Configuring hosted DNS servers
3 To modify the Zone Records tab, click the tab. This tab contains NS (Name
Server) and MX (Mail Exchange) records for forward zones. This tab
contains only NS Records for reverse zones.
The Name Servers table contains DNS NS records that indicate what
machines will act as name servers for this zone. By default the table contains
an entry for the machine you are currently using. (To add or delete an
entry use the New or Delete buttons, respectively. See “Adding an NS
record” on page 332 for details on adding a new entry.)
If this zone is configured to notify all slave servers when a zone file changes
(see “About the Advanced Zone Configuration window” on page 327 for a
description of the notify field), the notify commands are sent to all NS hosts
specified here.
The Zone MX Records list is available only if the selected zone entry is a
forward lookup entry. It is used to specify entries in the Mail Exchangers
table for the selected zone. The Mail Exchangers table contains DNS MX
records that indicate what machines will act as mail routers (mail exchangers)
for the selected domain. To add or delete an MX record entry use the
New or Delete buttons, respectively. See “Adding an MX record” on page
332 for details on adding a new MX record entry.
The Zone A Record field is available only if the selected zone entry is a forward
lookup entry. It defines a DNS A record (an Address record). A DNS A
record is used to map host names to IP addresses. The address you specify
must be entered using standard dotted quad notation (for example
172.14.207.27).
If the selected zone entry is a forward lookup entry, the TXT Record field is
available. This optional field allows you to enter comments or additional
information about this zone, such as sender id information.
4 Click the Save icon in the toolbar to save your changes. To configure
additional name server information, see “About the Master Zone Attributes
tab” on page 329.
This window is used to add a forward lookup sub-domain to the selected
forward lookup zone. By adding a sub-domain you are delegating authority for
a portion of the parent domain to the new sub-domain. Follow the steps below.
1 In the Forward Sub-Domain Name field, type the name of the sub-domain.
Do not type a fully qualified name. For example, assume you have a
domain named example.com that contains a sub-domain named west. You
would type west in this field rather than west.example.com.
2 In the Sub-Domain NS Records field, specify entries in the Name Servers
table for this sub-domain. The Name Servers table contains DNS NS
records that indicate what machines will act as name servers for this subdomain.
To add or delete an entry use the New or Delete buttons,
respectively. See “Adding an NS record” on page 332 for details on adding
a new entry.
3 [Optional] In the Sub-Domain MX Records field, specify entries in the Mail
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