NAT issues

Unanswered Question

i have just configured a network for a customer to access the network.

i have configured the internet gateway router for NAT.

I can reach both inside and outside interfaces of the internet gateway router from inside the network but when i try to get to the web, can't get through and no translations occurs.

But when I do a static NAT for any particular inside address it works.

Just can't figure out where I missed it .

Need help.

Attached are the configs of my router and switch as they are connected directly to each other.

I have this problem too.
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senthil_kumarpv Fri, 02/01/2008 - 02:30

Hi

can u please tell why this route has been added

ip route 10.0.0.0 255.0.0.0 10.1.22.1

Richard Burts Fri, 02/01/2008 - 02:43

Senthil

It is not my network and so I do not know for sure. But it seems fairly clear from the config that the subnet on the Gig0/0 is a /30 which only contains 2 addresses in network 10.0.0.0. And the default route points out Gig0/1. So if network 10.0.0.0 is behind Gig0/0 as seems logical then there needs to be a static route pointing 10.0.0.0/8 out Gig0/0. Without a static route for 10.0.0.0 the traffic would be forwarded using the default route out Gig0/1. If that is not right then perhaps Obiora can clarify.

If there were a dynamic routing protocol the static route would not be necessary. But no dynamic routing protocol is configured.

HTH

Rick

Richard Burts Fri, 02/01/2008 - 02:47

Obiora

My guess is that your problem with NAT has to do with the access list that identifies traffic. I suggest that you replace this list:

access-list 7 permit any log

with this version of the list:

access-list 7 permit 10.0.0.0 0.255.255.255 log

and while having the log parameter may be helpful during installation and testing I would suggest that you remove it before this router actually goes live. Depending on the amount of traffic being translated this could generate a very large volume of syslog records.

HTH

Rick

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