Cisco router as DNS-Proxy for LAN?

[imran_mcse]

I have Cisco 2522 router. I have configured it to connect with ISDN bri for internet sharing with NAT enabled. For my clients machine to reslove internet domain names i have installed a windows DNS Server in my LAN which is forwarding to queries to ISP DNS server. I want to know that is it possible that i can make my Cisco 2522 router a DNS Proxy so that it resolve host name requests for my whole lan on its own behalf from ISP DNS server. In this way i will disable my windows DNS server. Pls help me that how can i make my router to pass DNS name resolvetion requests on its own behalf(DNS Proxy).

[makchitale]

If I understand you requirement correctly then making the c2522 (with NAT enabled) as the DHCP server to assign IP address/ DNS server info.

ip dhcp pool HomeNetwork

network 192.168.1.0 255.255.255.0

default-router 192.168.1.1

dns-server 216.148.227.204 <=Providers DNS server

Thanks, Mak.

[makchitale]

There is a DNS proxy feature available in 12.3(2)T & later images, only on a certain platforms, unfortunately the c2500 does not support this feature. It acts as a DNS server for LAN connected devices, to always have a DNS server address to give to DHCP client regardless if the WAN/VPN DNS server has been learned over IPCP or DHCP already. For more info please refer to:

http://cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a00801a7605.html

Thanks, Mak.