Q:

NSIS NTLM Proxy authentication

I'm using NSIS for an installer program. We have to download some package from our server during installation and we use NSISdl library for this.
The problem is that we need to install the software in a network with a proxy with NTLM authentication. As the documentation of NSISdl says (http://nsis.sourceforge.net/Docs/NSISdl/ReadMe.txt), it's not possible to use configuration with proxy authentication. 
How can I do NTLM authentication? I've found a plugin Inetc for NSIS (http://nsis.sourceforge.net/Inetc_plug-in), it accept proxy authentification, but no indication for NTLM. Does someone have a solution?
Thanks

A:

INetC uses WinINet which is as close to IE as you are probably going to get. This page claims that the INTERNET_FLAG_KEEP_CONNECTION flag is required for NTLM. I don't know if this plugin uses that flag. If not you could request the author to add it or compile your own version...

