Dns Server Address Assignment; The Dns Screen - ZyXEL Communications USG FLEX H Series User Manual

Similarly, Dynamic DNS (DDNS) maps a domain name to a dynamic IP address. As a result, anyone can
use the domain name to contact you (in NetMeeting, CU-SeeMe, etc.) or to access your FTP server or
Web site, regardless of the current (dynamic) IP address.
Note: You must have a public WAN IP address to use Dynamic DNS.
You must set up a dynamic DNS account with a supported DNS service provider before you can use
Dynamic DNS services with the Zyxel Device. When registration is complete, the DNS service provider
gives you a password or key. At the time of writing, the Zyxel Device supports the following DNS service
providers. See the listed websites for details about the DNS services offered by each.
Table 178 DDNS Service Providers
PROVIDER
DynDNS
Dynu
No-IP
Peanut Hull
3322
Selfhost
Note: Record your DDNS account's user name, password, and domain name to use to
configure the Zyxel Device.
After you configure the Zyxel Device, it automatically sends updated IP addresses to the DDNS service
provider, which helps redirect traffic accordingly.

24.4.1 DNS Server Address Assignment

The Zyxel Device can get the DNS server addresses in the following ways.
• The ISP tells you the DNS server addresses, usually in the form of an information sheet, when you sign
up. If your ISP gives you DNS server addresses, manually enter them in the DNS server fields.
• If your ISP dynamically assigns the DNS server IP addresses (along with the Zyxel Device's WAN IP
address), set the DNS server fields to get the DNS server address from the ISP.
• You can manually enter the IP addresses of other DNS servers.

24.4.2 The DNS Screen

Click System > DNS & DDNS > DNS to change your Zyxel Device's DNS settings. Use the DNS screen to
configure the Zyxel Device to use a DNS server to resolve domain names for Zyxel Device system
features like VPN, DDNS and the time server. You can also configure the Zyxel Device to accept or
discard DNS queries. Use the Network > Interface screens to configure the DNS server information that
the Zyxel Device sends to the specified DHCP client devices.
A name query begins at a client computer and is passed to a resolver, a DNS client service, for
resolution. The Zyxel Device can be a DNS client service. The Zyxel Device can resolve a DNS query
locally using cached Resource Records (RR) obtained from a previous query (and kept for a period of
time). If the Zyxel Device does not have the requested information, it can forward the request to DNS
servers. This is known as recursion.
Chapter 24 System
SERVICE TYPES SUPPORTED
Dynamic DNS, Static DNS, and Custom DNS
Basic, Premium
No-IP
Peanut Hull
3322 Dynamic DNS, 3322 Static DNS
Selfhost
USG FLEX H Series User's Guide
362
WEBSITE
www.dyndns.com
www.dynu.com
www.no-ip.com
www.oray.cn
www.3322.org
selfhost.de