Hi. I have a rather strange problem with ASA 5510 and NAT.

For one of the servers I have done a static NAT so that Internet users can connect to it using http.

NAT goes like this:

static (DMZ,outside) x.x.x.x 192.168.254.160 netmask 255.255.255.255 dns

I have also the necessary lines to the outside ACL to let through the traffic for TCP ports 80 and 443.

The problem is the users get a message to enter a "level 15 access" user name and password. The server administrator also confirms that he doesn't get any requests on the server from the outside.

This has made us think that perhaps the problem is with the ASA. Has anyone encountered something like this before as I have never encountered this when I did static NATs before?

ASA version is 8.0(3).