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P-2601HN(L)-F1 Series User’s Guide
131
C
H A P T E R
9
DNS Route
9.1 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 ZyXEL Device uses a system DNS server (in the
order you specify in the Broadband screen) to resolve domain names that do not
match any DNS routing entry. After the ZyXEL Device receives a DNS reply from a
DNS server, it creates a new entry for the resolved IP address in the routing table.
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
10.10.23.7 is obtained from the WAN interface ppp1.123. You configure a DNS
route for *example.com to have the ZyXEL Device forward DNS requests for the
domain name mail.example.com through the WAN interface ppp1.123 to the DNS
server 10.10.23.7.
Figure 56
Example of DNS Routing Topology
WAN
LAN
ptm0.100
ppp1.123
DNS:10.10.23.7
DNS:168.92.5.1
sip.service.com
mail.example.com
(Default)
Summary of Contents for P-2601HN(L)-F1 Series
Page 2: ......
Page 8: ...Safety Warnings P 2601HN L F1 Series User s Guide 8 ...
Page 10: ...Contents Overview P 2601HN L F1 Series User s Guide 10 ...
Page 19: ...19 PART I User s Guide ...
Page 20: ...20 ...
Page 59: ...59 PART II Technical Reference ...
Page 60: ...60 ...
Page 110: ...Chapter 6 Wireless P 2601HN L F1 Series User s Guide 110 ...
Page 130: ...Chapter 8 Routing P 2601HN L F1 Series User s Guide 130 ...
Page 134: ...Chapter 9 DNS Route P 2601HN L F1 Series User s Guide 134 ...
Page 178: ...Chapter 16 VoIP P 2601HN L F1 Series User s Guide 178 Figure 81 VoIP SIP SIP Service Provider ...
Page 202: ...Chapter 16 VoIP P 2601HN L F1 Series User s Guide 202 ...
Page 206: ...Chapter 17 Logs P 2601HN L F1 Series User s Guide 206 ...
Page 212: ...Chapter 18 System Monitor P 2601HN L F1 Series User s Guide 212 ...
Page 220: ...Chapter 21 SNMP P 2601HN L F1 Series User s Guide 220 ...
Page 232: ...Chapter 26 Backup Restore P 2601HN L F1 Series User s Guide 232 ...
Page 290: ...Appendix B Setting Up Your Computer s IP Address P 2601HN L F1 Series User s Guide 290 ...
Page 322: ...Appendix D Wireless LANs P 2601HN L F1 Series User s Guide 322 ...
Page 332: ...Appendix F Open Software Announcements P 2601HN L F1 Series User s Guide 332 ...
Page 344: ...Index P 2601HN L F1 Series User s Guide 344 ...