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https://issues.apache.org/jira/browse/HADOOP-13295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348538#comment-15348538
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Ravi Prakash commented on HADOOP-13295:
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Mobin! Could you please answer Steve's original question?
bq. How are you deploying it?
I'm inclined to close this JIRA as invalid. We haven't seen this issue anywhere
else, and is probably an error in deployment.
> 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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