Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

NAT PROBLEM

I am running NAT on my 2611 with a single public ip (for simplicity 1.1.1.1 public ip and 10.10.10.1 internal ip), I have port 53 and 80 forwarded to my internal server 10.10.10.10.

If a client on my internal network accesses the 1.1.1.1 address on port 80, everything times out and nothing works. Requests from the outside work 100%. My internal network is routed thru the mentioned router 10.10.10.1

Any ideas how to make this work? i have several DNS entries that are set up to point the outside IP so clients can access, however using the same URL fails when access internally. I do NOT want to set up 2 dns servers, nor two zones.

In short :

Client 10.10.1.99 does a DNS lookup, which points to 1.1.1.1. On router 1.1.1.1 port 80 is forwarded to 10.10.1.10 ( on the same network as the requestor) So the packets make a big U turn. But it's not working :(

I have to be doing something wrong; I had this working for a client using a linksys router....something as powerful as the cisco must be able to have this feature.

2 REPLIES
New Member

Re: NAT PROBLEM

You can first check your routing by trying to browse to a website via ip address or just trying to ping.

Can you check if you turned off redirects on any of the interfaces? It will check the routing table before hitting NAT. Here is the order of operation link:

http://www.cisco.com/warp/public/556/5.html

-Jonathan

New Member

Re: NAT PROBLEM

yep pinging and accessing web sites works great. only problem is when i try to access the public ip of my router on port 80...which should be forwarded to a server on my internal lan (nat - inside).

i have no idea what a "redirect" is. so I assume they are defaulted.?

thanks for the help!

mm

113
Views
0
Helpful
2
Replies
CreatePlease to create content