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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-15600) Set default proxy user settings to non-routable IP addresses and default users group
Date Wed, 11 Jul 2018 23:00:00 GMT
Eric Yang created HADOOP-15600:
----------------------------------

             Summary: Set default proxy user settings to non-routable IP addresses and default
users group
                 Key: HADOOP-15600
                 URL: https://issues.apache.org/jira/browse/HADOOP-15600
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: security
            Reporter: Eric Yang


The default setting to restrict the cluster nodes to communicate with peer nodes are controlled
by: hadoop.proxyuser.[hdfs.yarn].hosts, and hadoop.proxyuser.[hdfs|yarn].groups.  These settings
are default to be opened which allows any hosts to impersonate any user.

The proposal is to default settings to:

{code}
    <property>
      <name>hadoop.proxyuser.hdfs.hosts</name>
      <value>127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,169.254.0.0/16</value>
    </property>

    <property>
      <name>hadoop.proxyuser.hdfs.groups</name>
      <value>users</value>
    </property>

    <property>
      <name>hadoop.proxyuser.yarn.hosts</name>
      <value>127.0.0.0/8,10.0.0.0/8,172.16.0.0/12,192.168.0.0/16,169.254.0.0/16</value>
    </property>

    <property>
      <name>hadoop.proxyuser.yarn.groups</name>
      <value>users</value>
    </property>
{code}

This will allow the cluster to default to a closed network and default "users" group to reduce
risks.



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