ZyXEL ISG50-ISDN User Guide - Page 675
PTR Record, Adding an Address/PTR Record, Domain Zone Forwarder
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Chapter 52 System 52.6.4 PTR Record A PTR (pointer) record is also called a reverse record or a reverse lookup record. It is a mapping of an IP address to a domain name. 52.6.5 Adding an Address/PTR Record Click the Add icon in the Address/PTR Record table to add an address/PTR record. Figure 447 Configuration > System > DNS > Address/PTR Record Add The following table describes the labels in this screen. Table 270 Configuration > System > DNS > Address/PTR Record Add LABEL FQDN DESCRIPTION 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. IP Address OK Cancel 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 OK to save your customized settings and exit this screen. Click Cancel to exit this screen without saving 52.6.6 Domain Zone Forwarder A domain zone forwarder contains a DNS server's IP address. The ISG50 can query the DNS server to resolve domain zones for features like VPN, DDNS and the time server. A domain zone is a fully qualified domain name without the host. For example, zyxel.com.tw is the domain zone for the www.zyxel.com.tw fully qualified domain name. ISG50 User's Guide 675
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