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http://jira.codehaus.org/browse/MNG-4228?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=183565#action_183565
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Oleg Kalnichevski commented on MNG-4228:
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> Follow up with the discussion in this issue related to NTLMv2 code in
> httpclient...
No, it is NOT. This has _nothing_ to do with HttpClient. SUN _licensed_ the
NTLM protocol from Microsoft, the luxury we obviously do not have. Besides,
they make use of native code accessing native Windows APIs somewhere in their
NTLM implementation, which makes NTLM auth in JRE HTTP Windows only.
HttpClient 4.0 supports NTLMv2 through JCIFS on all platforms. Unfortunately
due to licensing issues we cannot ship or even import JCIFS code.
This is a purely licensing issue and it has nothing to do with HttpClient. This
is the reason why the use of NTLM is strongly discouraged.
Oleg
> [regression] Authorization failed: Not authorized by proxy.
> -----------------------------------------------------------
>
> Key: MNG-4228
> URL: http://jira.codehaus.org/browse/MNG-4228
> Project: Maven 2
> Issue Type: Bug
> Components: Artifacts and Repositories, Settings
> Affects Versions: 2.2.0
> Environment: Windows XP, java version "1.6.0_04"
> Reporter: Marco Noto
> Assignee: John Casey
> Priority: Blocker
> Fix For: 2.2.1
>
> Attachments: NTLMV21.RAR, TestNTLMAuth.java
>
>
> I can not access any external repository using the version 2.2.0. If I go
> back to 2.1.0 everything works properly.
> For example:
> mvn -U eclipse:eclipse
> [INFO] Scanning for projects...
> [INFO] Searching repository for plugin with prefix: 'eclipse'.
> [INFO] org.apache.maven.plugins: checking for updates from central
> [WARNING] repository metadata for: 'org.apache.maven.plugins' could not be
> retrieved from repository: central due
> to an error: Authorization failed: Not authorized by proxy.
> [INFO] Repository 'central' will be blacklisted
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