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I'm writing a script that uses cURL to pull data from an internal web server. I can explicitly use --user combined with --ntlm and everything works well, but I can't get it to recognize whomever's logged in and pass it transparently. If I visit the same site in Chrome/Firefox/IE it immediately gives me permissions without any prompts (We are using a proxy here if that's important). The server is using IIS.

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up vote 15 down vote accepted

I use (in a Windows domain environment):

curl --ntlm -u : ...

cUrl knows to supply my domain credentials and it works every time.

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Worked perfectly, thanks a bunch! – MGSoto Feb 25 '11 at 16:16
Thanks @BillP3rd! Just a heads up: this works perfectly when running curl within a Windows command prompt, but does not work if you are running within a terminal emulator like Cygwin on your Windows machine. – ErinsMatthew Mar 12 at 12:20

Use -u : which provides an empty usercode and password, to get cURL to pick those up from the credential store.

I use this on Unix with GSSAPI and curl -u : --negotiate ...

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