> Then, what would be my problem ??? >From what you've told us, nothing - you never described any operational problems with Squid.
All you have asked about is what wb_ntlmauth gives you in a command-line test. As Henrik already told you, it is nearly impossible to test wb_ntlmauth from the command line because of the nature of NTLM auth. You've tested both your basic auth and external group helpers, and they work fine. That is all you can test from the command line; the only practical way to test NTLM auth is with a web browser that supports it. Adam