Nat Inside to Outside to Inside

[member 141630]

Hi,
This question relates to Cisco 877 IOS 12.3 and have the following issue:

I have a web server on the LAN (10.0.0.2) which has ports 80 and 21 NAT'd on to the OUTSIDE WAN interface (which has a real world address).

This works fine.

MY ISP DNS records point to the external real world IP, so external clients can access the FTP and

http://WWW services,

which all work no problem.

If I attempt to http or ftp to the external interface there's nothing there to connect to. In other words, I'm connecting from the INSIDE to the OUTSIDE which is NAT'd to the INSIDE again.

Of course I can kludge a hosts file or modify the internal DNS to force clients to the internal server, but I'd prefer this to work properly.

Does anyone have any ideas on how to remedy this issue?
On a PIX I can use the ALIAS command but cannot find such a helpful command on this router.

Many Thanks In Advance

Phil Blythe

 

[Linc1]

I am running an 827 router and Have the exact same issue. But for me when users inside try to go to the server they get a prompt for a user name and password... From the router! Instead of just being directed to the web server.

So if you get a reply to this, can you tell me and if I find a solution I will post back here what I have found.

 

[member 141630]

Follow up:
My Vigor 2600 could do this fine.

It appears this is called NAT Loopback, and from what I have read Cisco do not support this feature - unlike Netgear, Vigor, IPTables, Smoothwall, who all do.

There's £40 via PayPal to anyone who can provide an answer to this!

Cheers

Phil B

 

[kwing112000]

I have seen this on this forum before. IT has to do with DNS. Search DNS and you may find it.

 

[Linc1]

I FIGURED IT OUT ! ! !

It was basically and accident and I don't know what made it
work but it works. I can supply my config to anyone that wants to look at it and see if they can make theirs work with what I have.

Linc

 

[plshlpme]

can you post the jist of what you did to make it work?
was it a routemap or host entries?

 

[sandstormiredj]

I am having the same problem can you tell me what you did to fix it?? I HAVE BEEN THROWING MYSELF AGAINST THE WALL TRYING TO FIGURE THIS OUT

THANKS!!!!!

Kevin