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From "Yuanbo Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-14295) Authentication proxy filter on firewall cluster may fail authorization because of getRemoteAddr
Date Wed, 12 Apr 2017 04:09:41 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-14295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15965343#comment-15965343
] 

Yuanbo Liu commented on HADOOP-14295:
-------------------------------------

[~jeffreyr97] Thanks for filing this JIRA and good summary.
[~jojochuang] Thanks for looking into this JIRA.
Wei-chui, If you look into {{DatanodeHttpServer.java}}, you can find that it uses a Netty
to set up a internal proxy server. I also take a look at the http server in NameNode, there
is no such kind of proxy server. So getRemoteAddr doesn't work as expected if users access
some links in Datanode. Hope this info can help you get the background of this JIRA.
The patch from Jeff looks nice and we've tested it in our personal cluster. After Wei-chui's
comments are addressed, I'm +1(no-binding) for your patch.

> Authentication proxy filter on firewall cluster may fail authorization because of getRemoteAddr
> -----------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-14295
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14295
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>    Affects Versions: 2.7.4, 3.0.0-alpha2, 2.8.1
>            Reporter: Jeffrey E  Rodriguez
>            Assignee: Jeffrey E  Rodriguez
>            Priority: Critical
>             Fix For: 3.0.0-alpha2
>
>         Attachments: hadoop-14295.001.patch
>
>
> Many production environments use firewalls to protect network traffic. In the specific
case of DataNode UI and other Hadoop server for which their ports may fall on the list of
firewalled ports the org.apache.hadoop.security.AuthenticationWithProxyUserFilter user getRemotAdd
(HttpServletRequest) which may return the firewall host such as 127.0.0.1.
> This is unfortunately bad since if you are using a proxy in addition to do perimeter
protection, and you have added your proxy as a super user when  checking for the proxy IP
to authorize user this would fail since getRemoteAdd would return the IP of the firewall (127.0.0.1).
> "2017-04-08 07:01:23,029 ERROR security.AuthenticationWithProxyUserFilter (AuthenticationWithProxyUserFilter.java:getRemoteUser(94))
- Unable to verify proxy user: Unauthorized connection for super-user: knox from IP 127.0.0.1"
> I propese to add a check for x-forwarded-for header since proxys usually inject that
header before we do a getRemoteAddr



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