Eric Yang created HADOOP-15600:
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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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