NTLM authentication is typically only used on internal networks (e.g. intranets). You may need the following information if you are trying to mirror a local server, but generally you would not need to use this authentication when going out to external websites.
NTLM (NT Lan Manager) is an authentication protocol developed by Microsoft. Read more at the NTLM page on Wikipedia.
(Does this page also apply to "Integrated Windows Authentication"?)
On the HTTrack Forum, Victor informed us (2004-02-20) that he had successfully used HTTrack with NTLM.
He had installed MS ISA server on his work intranet but HTTrack would not run because of the NTLM authentication. However he found the program "NTLM Authorization Proxy Server" (APS) and provided some instructions.
Use proxy for ftp transfersbecause on my machine it didn't work
Sourced from http://forum.httrack.com/readmsg/7513/index.html