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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Httpclient and NTLMv1 protocol support
Date Wed, 06 May 2009 17:12:41 GMT
On Wed, May 06, 2009 at 09:36:30AM -0700, yoga p wrote:
> Hi,
> 
> We are using HttpClient (commons-httpclient-3.0-rc2.jar) for NTLM
> Authentication and currently facing issues when the following security
> settings in Windows Server 2003 or (win xp) is enabled:
> Control Panel -> Administrative Tools -> Domain Security Policy -> Local
> Policies -> Security Options -> Network security: Do not store LAN Manager
> Hash value on next password change.
> Click Enabled and then click OK.
> After setting this property, NTLM authentication fails with following error:
> 
> HTTP Error 401.1 - Unauthorized: Access is denied due to invalid
> credentials.
> Has anyone faced similar issue? If so, is there any possible work around
> other than disabling above setting?
> Also, does it mean that httpclient not supporting NTLM v1?
> In the authentication guide of httpclient (
> http://hc.apache.org/httpclient-3.x/authentication.html), under known
> limitations and problems, it is mentioned that "HttpClient provides limited
> support for what is known as NTLMv1, the early version of the NTLM
> protocol." Does anybody know what is the early version of the NTLM protocol?
> Thanks in advance.
> 
> Mr. Yoga

Your only option is upgrading to HttpClient 4.0 and following this guide:

http://hc.apache.org/httpcomponents-client/ntlm.html

Oleg

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