Is there any solution to not only proxy NTLM but to convert HTTP Basic Auth on the input side to NTLM on the output side?
Background: An internal SharePoint server using NTLM Auth should be accessible via an Apache reverse proxy. The problem is NTLM is stateful and mod_proxy can’t deal with it. Now Apache with mod_proxy could just provide Basic Auth (and authenticate via a passwd file or similar) and proxy to another internal Basic-Auth-to-NTLM translator. This just reads our http Auth credentials and passes them to SharePoint server.