DNS Proxy

infocis · ‎03-29-2006

Hi,

I am searching some information for doing with an 800 router a practical fonctionality provided with the Linksys router family.

Simply relay DNS request from the inside interface IP to the binded name-servers provide by the ISP on the outside interface. So PC's will be able to do dns request (UPD or TCP) with the router address.

Is there any information the would help me to understand how to do it

Thanks

The ISP

pkhatri · ‎03-29-2006

Hi,

You need to use NAT for this work. Try something like the following (I'm using 192.168.1.0/24 as your LAN network - change this to suit your needs):

interface Ethernet0

ip address 192.168.1.1 255.255.255.0

ip nat inside

!

interface Serial0 ! your WAN interface

ip nat outside

!

ip nat inside source list 10 interface serial0 overload

!

access-list 10 permit 192.168.1.0 0.0.0.255

Hope that helps - pls rate the post if it does.

Paresh

infocis · ‎03-30-2006

Thanks Paresh but I have already this one set as default for accessing all Internet services.

The one I need is to translate the Ethernet0 as a DNS service for the inside and in reality, there is a NAT command (or any other) to reach Internet DNS services from the ISP.

pkhatri · ‎03-30-2006

I'm not sure I understand what you are trying to achieve. Could you post some details, maybe an example with IP addresses ?

Paresh

infocis · ‎04-03-2006

Paresh,