Inside Clients can not access Inside Servers through Outside NAT Public IP

Answered Question
Aug 19th, 2008

Hi There. I have a Cisco ASA 5510 with an inside and outside Interface. We have a web server on the Inside Interface which is published via a Static NAT entry to a dedicated IP on the outside interface.

Users on the inside try to access this website from its Public IP address, and this does not work. Users on the Outside (Internet) are able to access the web server fine. Users on the Inside can also access the webserver fine by specifying the Private IP.

I know that I can change Hosts files, or create an Internal DNS zone to overwrite the DNS response with the Private IP from inside but these are not practical solutions. I need to add a NAT policy on the Cisco which will enable Internal users to use the Public IP, and have the ASA route the traffic back in to the Internal network.

I used to do this on a SonicWALL PRO 2040 and SonicWALL Support describes this as a NAT Loopback policy.

Any insight on how i could accomplish this specifically without changing DNS or hosts files would be greatly appreciated.

Thanks.

I have this problem too.
0 votes
Correct Answer by JORGE RODRIGUEZ about 8 years 5 months ago

Have a look here..

Try the hairpining solution, mid page down of link.

http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00807968d1.shtml

Rgds

Jorge

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