ZyXEL ISG50-PSTN User Guide - Page 676
Adding a Domain Zone Forwarder, MX Record
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Chapter 52 System 52.6.7 Adding a Domain Zone Forwarder Click the Add icon in the Domain Zone Forwarder table to add a domain zone forwarder record. Figure 448 Configuration > System > DNS > Domain Zone Forwarder Add The following table describes the labels in this screen. Table 271 Configuration > System > DNS > Domain Zone Forwarder Add LABEL Domain Zone DESCRIPTION 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. For example, whenever the ISG50 receives needs to resolve a zyxel.com.tw domain name, it can send a query to the recorded name server IP address. DNS Server Enter * if all domain zones are served by the specified DNS server(s). Select DNS Server(s) from ISP if your ISP dynamically assigns DNS server information. You also need to select an interface through which the ISP provides the DNS server IP address(es). The interface should be activated and set to be a DHCP client. The fields below display the (read-only) DNS server IP address(es) that the ISP assigns. N/A displays for any DNS server IP address fields for which the ISP does not assign an IP address. Select Public DNS Server if you have the IP address of a DNS server. Enter the DNS server's IP address in the field to the right. The ISG50 must be able to connect to the DNS server without using a VPN tunnel. The DNS server could be on the Internet or one of the ISG50's local networks. You cannot use 0.0.0.0. Use the Query via field to select the interface through which the ISG50 sends DNS queries to a DNS server. OK Cancel Select Private DNS Server if you have the IP address of a DNS server to which the ISG50 connects through a VPN tunnel. Enter the DNS server's IP address in the field to the right. You cannot use 0.0.0.0. Click OK to save your customized settings and exit this screen. Click Cancel to exit this screen without saving 52.6.8 MX Record A MX (Mail eXchange) record indicates which host is responsible for the mail for a particular domain, that is, controls where mail is sent for that domain. If you do not configure proper MX records for your domain or other domain, external e-mail from other mail servers will not be able to 676 ISG50 User's Guide
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