Cname Record; Adding A Cname Record - ZyXEL Communications USG FLEX H Series User Manual

Figure 223 System > DNS & DDNS > DNS > Address/PTR Record > Add
The following table describes the labels in this screen.
Table 180 System > DNS & DDNS > DNS > Address/PTR Record > Add
LABEL
Hostname
Domain
IP Address
Save changes
Cancel changes

24.4.5 CNAME Record

A Canonical Name Record or CNAME record is a type of resource record in the Domain Name System
(DNS) that specifies that the domain name is an alias of another, canonical domain name. This allows
users to set up a record for a domain name which translates to an IP address, in other words, the domain
name is an alias of another. This record also binds all the subdomains to the same IP address without
having to create a record for each, so when the IP address is changed, all subdomain's IP address is
updated as well, with one edit to the record.
For example, the domain name zyxel.com is hooked up to a record named A which translates it to
11.22.33.44. You also have several subdomains, like mail.zyxel.com, ftp.zyxel.com and you want this
subdomain to point to your main domain zyxel.com. Edit the IP Address in record A and all subdomains
will follow automatically. This eliminates chances for errors and increases efficiency in DNS
management.

24.4.6 Adding a CNAME Record

Click the Add icon in the CNAME Record table to add a record. Use "*." as a prefix for a wildcard
domain name. For example *.zyxel.com.
Chapter 24 System
DESCRIPTION
Enter the hostname of a server.
Type a Fully-Qualified Domain Name (FQDN) of a server. An FQDN starts with a host name
and continues all the way up to the top-level domain name. For example, www.zyxel.com.tw
is a fully qualified domain name, where "www" is the host, "zyxel" is the third-level domain,
"com" is the second-level domain, and "tw" is the top level domain. Underscores are not
allowed.
Use "*." as a prefix in the FQDN for a wildcard domain name (for example, *.example.com).
Enter the IP address of the host in dotted decimal notation.
Click the Save changes icon to save your customized settings and exit this screen.
Click the Cancel changes icon to exit this screen without saving.
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