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Posted to common-issues@hadoop.apache.org by "Mobin Ranjbar (JIRA)" <ji...@apache.org> on 2016/06/20 14:22:05 UTC

[jira] [Created] (HADOOP-13295) Possible Vulnerability in DataNodes via SSH

Mobin Ranjbar created HADOOP-13295:
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             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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