I was wondering what is the best way to take care of the following:

I have been using a private address space behind a Cisco 4500 router
connected up to our current ISP using NAT, now we want to move our
connection from our current ISP to a new ISP with better bandwidth. My
problem is that we don't want to change all our client machines TCP/IP
settings, which are all static, for some reason or another they were all
setup to use our ISP's DNS. Not my idea but that another problem. So how can
I setup our router to forward requests looking from our current ISP's DNS to
our new ISP's DNS without touching all the client machines.

Would the best way be to use policy-base routing?

Would a static route work?

Could I use a static route under NAT?

If someone could proved me a sample of how you could do this I would be
greatful...

Thanks
Michael




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