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From "Mobin Ranjbar (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-13295) Possible Vulnerability in DataNodes via SSH
Date Mon, 20 Jun 2016 14:22:05 GMT
Mobin Ranjbar created HADOOP-13295:

             Summary: Possible Vulnerability in DataNodes via SSH
                 Key: HADOOP-13295
                 URL: https://issues.apache.org/jira/browse/HADOOP-13295
             Project: Hadoop Common
          Issue Type: Bug
            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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