Security-Enhanced Linux secures the boinc processes via flexible mandatory access control.
The boinc processes execute with the boinc_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
ps -eZ | grep boinc_t
The boinc_t SELinux type can be entered via the boinc_exec_t file type.
The default entrypoint paths for the boinc_t domain are the following:
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 psbP
Policy governs the access confined processes have to files. SELinux boinc policy is very flexible allowing users to setup their boinc processes in as secure a method as possible.
The following process types are defined for boinc:
Note: semanage permissive -a boinc_t can be used to make the process type boinc_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
SELinux policy is customizable based on least access required. boinc policy is extremely flexible and has several booleans that allow you to manipulate the policy and run boinc with the tightest access possible.
If you want to determine whether boinc can execmem/execstack, you must turn on the boinc_execmem boolean. Enabled by default.
setsebool -P boinc_execmem 1
If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.
setsebool -P daemons_dontaudit_scheduling 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 allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1
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 boinc policy is very flexible allowing users to setup their boinc processes in as secure a method as possible.
The following port types are defined for boinc:
Default Defined Ports: tcp 1043 udp 1034
Default Defined Ports: tcp 31416
The SELinux process type boinc_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.
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 lsbP
Policy governs the access confined processes have to these files. SELinux boinc policy is very flexible allowing users to setup their boinc processes in as secure a method as possible.
boinc policy stores data with multiple different file context types under the /var/lib/boinc 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 directory you would execute the following command:
semanage fcontext -a -e /var/lib/boinc /srv/boinc
restorecon -R -v /srv/boinc
STANDARD FILE CONTEXT
SELinux defines the file context types for the boinc, if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk.
semanage fcontext -a -t boinc_exec_t '/srv/boinc/content(/.*)?'
restorecon -R -v /srv/myboinc_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for boinc:
- Set files with the boinc_exec_t type, if you want to transition an executable to the boinc_t domain.
- Set files with the boinc_initrc_exec_t type, if you want to transition an executable to the boinc_initrc_t domain.
- Set files with the boinc_log_t type, if you want to treat the data as boinc log data, usually stored under the /var/log directory.
- Set files with the boinc_project_tmp_t type, if you want to store boinc project temporary files in the /tmp directories.
- Set files with the boinc_project_var_lib_t type, if you want to store the boinc project files under the /var/lib directory.
- Set files with the boinc_tmp_t type, if you want to store boinc temporary files in the /tmp directories.
- Set files with the boinc_tmpfs_t type, if you want to store boinc files on a tmpfs file system.
- Set files with the boinc_unit_file_t type, if you want to treat the files as boinc unit content.
- Set files with the boinc_var_lib_t type, if you want to store the boinc files under the /var/lib directory.
/var/lib/boinc(/.*)?, /var/lib/boinc-client(/.*)?, /etc/boinc-client/global_prefs_override.xml
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.
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.
This manual page was auto-generated using sepolicy manpage .
selinux(8), boinc(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8), boinc_project_selinux(8), boinc_project_selinux(8)