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HDFS >> mail # dev >> Regarding Datanode secure ports


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Re: Regarding Datanode secure ports
Hi Raghu,

I'm aware of no immediate plans to eliminate this property, but HDFS-2856
will change the security design on the protocol between HDFS client and
datanode such that secure datanodes will not require a privileged port, and
thus you won't need this configuration property.  HDFS-2856 is still under
design review.

https://issues.apache.org/jira/browse/HDFS-2856

Please note that ignore.secure.ports.for.testing is not suitable for
running a secure production cluster.  It opens a risk of a rogue map or
reduce task binding to the datanode's RPC port, impersonating a legitimate
datanode, and stealing secrets or sensitive data.  (That jira includes a
full description of the attack vector if you're interested.)

I hope this helps.  Thanks!

Chris Nauroth
Hortonworks
http://hortonworks.com/

On Tue, May 21, 2013 at 12:24 PM, Raghu Doppalapudi
<[EMAIL PROTECTED]>wrote:

> I am starting datanode in secure mode on higher default ports by overriding
> the following property.
>
>         <property>
>                 <name>ignore.secure.ports.for.testing</name>
>                 <value>true</value>
>         </property>
>
> Is this property going to be a permanent one, please suggest whether this
> property good to use, I just want to check whether this is temporary or
> permanent property.
>
> Thanks
>