With NTLM you'd get the same authentication window as with basic authentication, only you'd authenticate against a MS domain.
By your description I'd say cookies, too, which usually isn't something that wget can do by itself. The --http-* options usually are only for basic/digest authentication, so cookie authentication is either a feature from the modified wget binary on Red Hat, or there's some other factor.
There are 3 options that could work:
- Create a "cookie jar" that can be used with wget's --load-cookies
- Pass the cookie required using wget's --header (see the man page for more details)
- Switch to curl and use -b/--cookie to pass a cookie along
Details depend on what cookies the site expects to be set to what values.