Forwarding IP address request to a different IP address

[hikmatic]

Hello I really need some help with this issue, if anyone can help I would be very grateful. Here is the issue. I manage a large lab of computers all connected to switches which is ultimately connected to a cisco router. Currently I was using a DNS provided by verizon, which I configured on all the lab computers. Recently verizon shut down that DNS server so now I am forced to use a different DNS like OpenDNS. Is there a
way I can configure my router to forward all requests to IP address X.X.X.X to another IP address lets say 4.2.2.2.

Basically what I want is when the computers try to send requests to X.X.X.X. The router recognizes this and forwards it to a different address so I can keep my DNS alive until I have time to change it. thank you

 

[hummer3331973]

Yes, that will be easy by adding a static route on the router.

You can set it like this:

ip route 1.2.3.4 255.255.255.0 a.b.c.d where "1.2.3.4" is the ip address that you want to forward to another network, which is a.b.c.d.

 

[StaplesMan]

The best way of doing this is to make your router a dns server. Add the following commands. after you add these commands then have all your computers DNS be the router's IP address.

ip name-server 208.67.220.220
ip name-server 208.67.222.222
ip dns server



CCNA, A+, HP Certified Professional

 

[hikmatic]

thanx Hummer, I did try that but it seems that the DNS that I am forwarding it to is not responding because its not referenced in the packet itself. It seems to ignore it instead.

 

[hikmatic]

I ended up just configuring the router as a DNS server (thanx stapleman) itself and reconfiguring all the computers in the lab.