showmount_selinux(8) SELinux Policy showmount showmount_selinux(8)
showmount_selinux - Security Enhanced Linux Policy for the showmount processes
Security-Enhanced Linux secures the showmount processes via flexible mandatory access control.
The showmount processes execute with the showmount_t SELinux type. You can check if you have these processes running by executing the ps
command with the -Z qualifier.
ps -eZ | grep showmount_t
The showmount_t SELinux type can be entered via the showmount_exec_t file type.
The default entrypoint paths for the showmount_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 ps
Policy governs the access confined processes have to files. SELinux showmount policy is very flexible allowing users to setup their show-
mount processes in as secure a method as possible.
The following process types are defined for showmount:
Note: semanage permissive -a showmount_t can be used to make the process type showmount_t permissive. SELinux does not deny access to per-
missive process types, but the AVC (SELinux denials) messages are still generated.
SELinux policy is customizable based on least access required. showmount policy is extremely flexible and has several booleans that allow
you to manipulate the policy and run showmount with the tightest access possible.
If you want to deny any process from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. Enabled by
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 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
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 allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.
setsebool -P nscd_use_shm 1
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 showmount policy is very flexible allowing users to setup their
showmount processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the showmount, 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 showmount_exec_t '/srv/showmount/content(/.*)?'
restorecon -R -v /srv/myshowmount_content
Note: SELinux often uses regular expressions to specify labels that match multiple files.
The following file types are defined for showmount:
- Set files with the showmount_exec_t type, if you want to transition an executable to the showmount_t domain.
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 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), showmount(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8)
showmount 14-06-10 showmount_selinux(8)