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l2tpd_selinux(8) SELinux Policy l2tpd l2tpd_selinux(8)

NAME

l2tpd_selinux - Security Enhanced Linux Policy for the l2tpd processes

DESCRIPTION

Security-Enhanced Linux secures the l2tpd processes via flexible mandatory access control.

The l2tpd processes execute with the l2tpd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.

For example:

ps -eZ | grep l2tpd_t

ENTRYPOINTS

The l2tpd_t SELinux type can be entered via the file_type, unlabeled_t, proc_type, filesystem_type, l2tpd_exec_t, mtrr_device_t, sysctl_type file types.

The default entrypoint paths for the l2tpd_t domain are the following:

all files on the system, /usr/sbin/xl2tpd, /usr/sbin/prol2tpd, /usr/sbin/openl2tpd, /dev/cpu/mtrr

PROCESS TYPES

SELinux defines process types (domains) for each process running on the system

You can see the context of a process using the -Z option to ps

Policy governs the access confined processes have to files. SELinux l2tpd policy is very flexible allowing users to setup their l2tpd processes in as secure a method as possible.

The following process types are defined for l2tpd:

l2tpd_t

Note: semanage permissive -a l2tpd_t can be used to make the process type l2tpd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS

SELinux policy is customizable based on least access required. l2tpd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run l2tpd with the tightest access possible.

If you want to allow all daemons to write corefiles to /, you must turn on the allow_daemons_dump_core boolean. Disabled by default.

setsebool -P allow_daemons_dump_core 1

If you want to allow all daemons to use tcp wrappers, you must turn on the allow_daemons_use_tcp_wrapper boolean. Disabled by default.

setsebool -P allow_daemons_use_tcp_wrapper 1

If you want to allow all daemons the ability to read/write terminals, you must turn on the allow_daemons_use_tty boolean. Disabled by default.

setsebool -P allow_daemons_use_tty 1

If you want to allow all domains to use other domains file descriptors, you must turn on the allow_domain_fd_use boolean. Enabled by default.

setsebool -P allow_domain_fd_use 1

If you want to allow unconfined executables to make their heap memory executable. Doing this is a really bad idea. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla, you must turn on the allow_execheap boolean. Disabled by default.

setsebool -P allow_execheap 1

If you want to allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla), you must turn on the allow_execmem boolean. Enabled by default.

setsebool -P allow_execmem 1

If you want to allow all unconfined executables to use libraries requiring text relocation that are not labeled textrel_shlib_t), you must turn on the allow_execmod boolean. Enabled by default.

setsebool -P allow_execmod 1

If you want to allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla), you must turn on the allow_execstack boolean. Enabled by default.

setsebool -P allow_execstack 1

If you want to allow sysadm to debug or ptrace all processes, you must turn on the allow_ptrace boolean. Disabled by default.

setsebool -P allow_ptrace 1

If you want to enable cluster mode for daemons, you must turn on the daemons_enable_cluster_mode boolean. Disabled by default.

setsebool -P daemons_enable_cluster_mode 1

If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by default.

setsebool -P domain_kernel_load_modules 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

setsebool -P global_ssp 1

If you want to enable support for upstart as the init program, you must turn on the init_upstart boolean. Enabled by default.

setsebool -P init_upstart 1

If you want to allow certain domains to map low memory in the kernel, you must turn on the mmap_low_allowed boolean. Disabled by default.

setsebool -P mmap_low_allowed 1

If you want to boolean to determine whether the system permits loading policy, setting enforcing mode, and changing boolean values. Set this to true and you have to reboot to set it back, you must turn on the secure_mode_policyload boolean. Disabled by default.

setsebool -P secure_mode_policyload 1

If you want to support X userspace object manager, you must turn on the xserver_object_manager boolean. Disabled by default.

setsebool -P xserver_object_manager 1

PORT TYPES

SELinux defines port types to represent TCP and UDP ports.

You can see the types associated with a port by using the following command:

semanage port -l

Policy governs the access confined processes have to these ports. SELinux l2tpd policy is very flexible allowing users to setup their l2tpd processes in as secure a method as possible.

The following port types are defined for l2tpd:





Default Defined Ports: tcp 1701 udp 1701






MANAGED FILES


The SELinux process type l2tpd_t can manage files labeled with the
    following file types. The paths listed are the default paths for these file
    types. Note the processes UID still need to have DAC permissions.


file_type


	all files on the system








FILE CONTEXTS


SELinux requires files to have an extended attribute to define the
    file type.


You can see the context of a file using the -Z option to
    ls


Policy governs the access confined processes have to these files.
    SELinux l2tpd policy is very flexible allowing users to setup their l2tpd
    processes in as secure a method as possible.


EQUIVALENCE DIRECTORIES




l2tpd policy stores data with multiple different file context
    types under the /var/run/xl2tpd directory. If you would like to store the
    data in a different directory you can use the semanage command to create an
    equivalence mapping. If you wanted to store this data under the /srv
    dirctory you would execute the following command:


semanage fcontext -a -e /var/run/xl2tpd /srv/xl2tpd
  

  restorecon -R -v /srv/xl2tpd


l2tpd policy stores data with multiple different file context
    types under the /var/run/prol2tpd directory. If you would like to store the
    data in a different directory you can use the semanage command to create an
    equivalence mapping. If you wanted to store this data under the /srv
    dirctory you would execute the following command:


semanage fcontext -a -e /var/run/prol2tpd /srv/prol2tpd
  

  restorecon -R -v /srv/prol2tpd


STANDARD FILE CONTEXT


SELinux defines the file context types for the l2tpd, if you
    wanted to store files with these types in a diffent paths, you need to
    execute the semanage command to sepecify alternate labeling and then use
    restorecon to put the labels on disk.


semanage fcontext -a -t l2tpd_var_run_t
    '/srv/myl2tpd_content(/.*)?'
  

  restorecon -R -v /srv/myl2tpd_content


Note: SELinux often uses regular expressions to specify labels
    that match multiple files.


The following file types are defined for l2tpd:






l2tpd_exec_t



- Set files with the l2tpd_exec_t type, if you want to transition
    an executable to the l2tpd_t domain.





  

  
/usr/sbin/xl2tpd, /usr/sbin/prol2tpd, /usr/sbin/openl2tpd
    

  




l2tpd_initrc_exec_t



- Set files with the l2tpd_initrc_exec_t type, if you want to
    transition an executable to the l2tpd_initrc_t domain.





  

  
/etc/rc.d/init.d/xl2tpd, /etc/rc.d/init.d/prol2tpd,
      /etc/rc.d/init.d/openl2tpd
    

  




l2tpd_tmp_t



- Set files with the l2tpd_tmp_t type, if you want to store l2tpd
    temporary files in the /tmp directories.






l2tpd_var_run_t



- Set files with the l2tpd_var_run_t type, if you want to store
    the l2tpd files under the /run or /var/run directory.





  

  
/var/run/xl2tpd(/.*)?, /var/run/prol2tpd(/.*)?, /var/run/xl2tpd.pid,
      /var/run/prol2tpd.ctl, /var/run/prol2tpd.pid, /var/run/openl2tpd.pid
    

  




Note: File context can be temporarily modified with the chcon
    command. If you want to permanently change the file context you need to use
    the semanage fcontext command. This will modify the SELinux labeling
    database. You will need to use restorecon to apply the labels.








COMMANDS


semanage fcontext can also be used to manipulate default
    file context mappings.


semanage permissive can also be used to manipulate whether
    or not a process type is permissive.


semanage module can also be used to
    enable/disable/install/remove policy modules.


semanage port can also be used to manipulate the port
    definitions


semanage boolean can also be used to manipulate the
    booleans




system-config-selinux is a GUI tool available to customize
    SELinux policy settings.








AUTHOR


This manual page was auto-generated using sepolicy manpage
    .








SEE ALSO


selinux(8), l2tpd(8), semanage(8), restorecon(8), chcon(1) ,
    setsebool(8)







  

    15-06-03
    l2tpd