xend_selinux(8) - Linux man page

Name

xend_selinux - Security Enhanced Linux Policy for the xend processes

Description

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

The xend processes execute with the xend_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 xend_t

Entrypoints

The xend_t SELinux type can be entered via the "mtrr_device_t,unlabeled_t,proc_type,sysctl_type,filesystem_type,file_type,xend_exec_t" file types. The default entrypoint paths for the xend_t domain are the following:"

/dev/cpu/mtrr, all files on the system, /usr/sbin/xend

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 xend policy is very flexible allowing users to setup their xend processes in as secure a method as possible.

The following process types are defined for xend:

xend_t, xenstored_t, xenconsoled_t

Note: semanage permissive -a xend_t

can be used to make the process type xend_t permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.

Booleans

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

If you want to allow xen to manage nfs files, you must turn on the xen_use_nfs boolean.

setsebool -P xen_use_nfs 1

If you want to allow xen to manage nfs files, you must turn on the xen_use_nfs boolean.

setsebool -P xen_use_nfs 1

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 xend policy is very flexible allowing users to setup their xend processes in as secure a method as possible.

The following file types are defined for xend:

xend_exec_t

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

xend_tmp_t

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

xend_var_lib_t

- Set files with the xend_var_lib_t type, if you want to store the xend files under the /var/lib directory.

xend_var_log_t

- Set files with the xend_var_log_t type, if you want to treat the data as xend var log data, usually stored under the /var/log directory.

xend_var_run_t

- Set files with the xend_var_run_t type, if you want to store the xend files under the /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.

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 xend policy is very flexible allowing users to setup their xend processes in as secure a method as possible.

The following port types are defined for xend:

xen_port_t
Default Defined Ports:: tcp 8002

Managed Files

The SELinux process type xend_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

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 by mgrepl.