Security-Enhanced Linux secures the soundd processes via flexible mandatory access control.
The soundd processes execute with the soundd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier.
ps -eZ | grep soundd_t
The soundd_t SELinux type can be entered via the soundd_exec_t file type.
The default entrypoint paths for the soundd_t domain are the following:
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux soundd policy is very flexible allowing users to setup their soundd processes in as secure a method as possible.
The following process types are defined for soundd:
Note: semanage permissive -a soundd_t can be used to make the process type soundd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.
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
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 soundd policy is very flexible allowing users to setup their soundd processes in as secure a method as possible.
The following port types are defined for soundd:
Default Defined Ports: tcp 8000,9433,16001
The SELinux process type soundd_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.
You can see the context of a file using the -Z option to lsP Policy governs the access confined processes have to these files. SELinux soundd policy is very flexible allowing users to setup their soundd processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the soundd, 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 soundd_var_run_t '/srv/mysoundd_content(/.*)?'
restorecon -R -v /srv/mysoundd_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for soundd:
- Set files with the soundd_etc_t type, if you want to store soundd files in the /etc directories.
- Set files with the soundd_exec_t type, if you want to transition an executable to the soundd_t domain.
- Set files with the soundd_initrc_exec_t type, if you want to transition an executable to the soundd_initrc_t domain.
- Set files with the soundd_state_t type, if you want to treat the files as soundd state data.
- Set files with the soundd_tmp_t type, if you want to store soundd temporary files in the /tmp directories.
- Set files with the soundd_tmpfs_t type, if you want to store soundd files on a tmpfs file system.
- Set files with the soundd_var_run_t type, if you want to store the soundd files under the /run or /var/run directory.
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 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.