Can not ping the Proxy

Hi all, i've installed the 1605 at clinet site and it is working fine. my router can able to ping their DNS, Gateway as well any internet sites , but can not ping their proxy so because of this i can not open the internet throgh my router, pl tell me why i can ping their proxy address or name.

DHCP server and IP Nat On 2621

Hi all, Could any one send me the following configuration: 1)I want to make DHCP server on 2621. 2) I have 2621 router and I want to do the IP Nating on e0, the scenario is Switchrouter (2621)|switch router---Internet My site client site 2621 port e0 to cl