17
DNS Route
17.1 Overview
DNS (Domain Name System) is for mapping a domain name to its corresponding IP address and vice versa. The DNS server is extremely important because without it, you must know the IP address of a machine before you can access it.
In addition to the system DNS server(s), each WAN interface (service) is set to have its own static or dynamic DNS server list. You can configure a DNS static route to forward DNS queries for certain domain names through a specific WAN interface to its DNS server(s). The
In the following example, the DNS server 168.92.5.1 obtained from the WAN interface ptm0.100 is set to be the system DNS server. The DNS server
10.10.23.7is obtained from the WAN interface ppp1.123. You configure a DNS route for *example.com to have the
Figure 154 Example of DNS Routing Topology
LANWAN
ptm0.100 DNS:168.92.5.1 (Default)
ppp1.123 | sip.service.com |
|
mail.example.com
DNS:10.10.23.7
| 301 |
|
|