/etc/java-6-openjdk/management/jmxremote.access is in openjdk-6-jre-headless 6b24-1.11.1-4ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Default Access Control File for Remote JMX(TM) Monitoring
######################################################################
#
# Access control file for Remote JMX API access to monitoring.
# This file defines the allowed access for different roles. The
# password file (jmxremote.password by default) defines the roles and their
# passwords. To be functional, a role must have an entry in
# both the password and the access files.
#
# The default location of this file is $JRE/lib/management/jmxremote.access
# You can specify an alternate location by specifying a property in
# the management config file $JRE/lib/management/management.properties
# (See that file for details)
#
# The file format for password and access files is syntactically the same
# as the Properties file format. The syntax is described in the Javadoc
# for java.util.Properties.load.
# A typical access file has multiple lines, where each line is blank,
# a comment (like this one), or an access control entry.
#
# An access control entry consists of a role name, and an
# associated access level. The role name is any string that does not
# itself contain spaces or tabs. It corresponds to an entry in the
# password file (jmxremote.password). The access level is one of the
# following:
# "readonly" grants access to read attributes of MBeans.
# For monitoring, this means that a remote client in this
# role can read measurements but cannot perform any action
# that changes the environment of the running program.
# "readwrite" grants access to read and write attributes of MBeans,
# to invoke operations on them, and optionally
# to create or remove them. This access should be granted
# only to trusted clients, since they can potentially
# interfere with the smooth operation of a running program.
#
# The "readwrite" access level can optionally be followed by the "create" and/or
# "unregister" keywords. The "unregister" keyword grants access to unregister
# (delete) MBeans. The "create" keyword grants access to create MBeans of a
# particular class or of any class matching a particular pattern. Access
# should only be granted to create MBeans of known and trusted classes.
#
# For example, the following entry would grant readwrite access
# to "controlRole", as well as access to create MBeans of the class
# javax.management.monitor.CounterMonitor and to unregister any MBean:
# controlRole readwrite \
# create javax.management.monitor.CounterMonitorMBean \
# unregister
# or equivalently:
# controlRole readwrite unregister create javax.management.monitor.CounterMBean
#
# The following entry would grant readwrite access as well as access to create
# MBeans of any class in the packages javax.management.monitor and
# javax.management.timer:
# controlRole readwrite \
# create javax.management.monitor.*,javax.management.timer.* \
# unregister
#
# The \ character is defined in the Properties file syntax to allow continuation
# lines as shown here. A * in a class pattern matches a sequence of characters
# other than dot (.), so javax.management.monitor.* matches
# javax.management.monitor.CounterMonitor but not
# javax.management.monitor.foo.Bar.
#
# A given role should have at most one entry in this file. If a role
# has no entry, it has no access.
# If multiple entries are found for the same role name, then the last
# access entry is used.
#
#
# Default access control entries:
# o The "monitorRole" role has readonly access.
# o The "controlRole" role has readwrite access and can create the standard
# Timer and Monitor MBeans defined by the JMX API.
monitorRole readonly
controlRole readwrite \
create javax.management.monitor.*,javax.management.timer.* \
unregister
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