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https://issues.apache.org/jira/browse/HADOOP-4284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12635458#action_12635458
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Doug Cutting commented on HADOOP-4284:
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Kan, this sounds good.  Thanks for bearing with me here.

> Support for user configurable global filters on HttpServer
> ----------------------------------------------------------
>
>                 Key: HADOOP-4284
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4284
>             Project: Hadoop Core
>          Issue Type: New Feature
>            Reporter: Kan Zhang
>         Attachments: 4284_20080925_78.patch, 4284_20080926_79.patch
>
>
> HADOOP-3854 introduced a framework for adding filters to filter browser 
> facing urls. Sometimes, there is a need to filter all urls. For example, at 
> Yahoo, we need to open an SSL port on the HttpServer and only accept hsftp 
> requests from clients who can authenticate themselves using client 
> certificate and is authorized according to certain policy file. For this to 
> happen, we need a method to add a user configurable "global" filter, which 
> filters on all client requests. For our purposes, such a global filter will 
> block all https requests except those accessing the hsftp interface (it will 
> let all http requests go through, so accesses through the normal http ports 
> are unaffected). Moreover, those hsftp requests will be subject to further 
> authorization checking according to the policy file.

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