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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13295) Possible Vulnerability in DataNodes via SSH
Date Tue, 21 Jun 2016 09:19:58 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated HADOOP-13295:
------------------------------------
    Component/s: security

> Possible Vulnerability in DataNodes via SSH
> -------------------------------------------
>
>                 Key: HADOOP-13295
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13295
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>            Reporter: Mobin Ranjbar
>
> I suspected something weird in my Hadoop cluster. When I run datanodes, after a while
my servers(except namenode) will be down for SSH Max Attempts. When I checked the 'systemctl
status ssh', I figured out there are some invalid username/password attempts via SSH and the
SSH daemon blocked all incoming connections and I got connection refused.
> I have no problem when my datanodes are not running.



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