Configuring Maven behind an NTLM proxy
Maven, by itself, cannot work behind an NTLM proxy (e.g. ISA servers), because this kind of HTTP connection is not supported... at least directly.
CNTLM is easy to install and configure. Once installed as reported in the website, configure Maven to work with CNTLM, adding this code in your settings.xml.
Et voilà! Maven works!
Using NTLM APS
NTLM has a bug with chunked responses, so you have to patch it, so I suggest to use CNTLM.
Anyway, if you want to make NTLM APS work: