portmap_selinux(8) - Linux man page

Name

portmap_selinux - Security Enhanced Linux Policy for the portmap processes

Description

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

The portmap processes execute with the portmap_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 portmap_t

Entrypoints

The portmap_t SELinux type can be entered via the "portmap_exec_t" file type. The default entrypoint paths for the portmap_t domain are the following:"

/sbin/portmap

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

The following process types are defined for portmap:

portmap_helper_t, portmap_t

Note: semanage permissive -a portmap_t

can be used to make the process type portmap_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. portmap policy is extremely flexible and has several booleans that allow you to manipulate the policy and run portmap with the tightest access possible.

If you want to allow samba to act as a portmapper, you must turn on the samba_portmapper boolean.

setsebool -P samba_portmapper 1

If you want to allow samba to act as a portmapper, you must turn on the samba_portmapper boolean.

setsebool -P samba_portmapper 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 portmap policy is very flexible allowing users to setup their portmap processes in as secure a method as possible.

The following file types are defined for portmap:

portmap_exec_t

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

portmap_helper_exec_t

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

portmap_tmp_t

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

portmap_var_run_t

- Set files with the portmap_var_run_t type, if you want to store the portmap 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 portmap policy is very flexible allowing users to setup their portmap processes in as secure a method as possible.

The following port types are defined for portmap:

portmap_port_t
Default Defined Ports:: tcp 111 udp 111

Managed Files

The SELinux process type portmap_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.

initrc_tmp_t

mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

portmap_tmp_t
portmap_var_run_t

/var/run/portmap.upgrade-state

root_t

/initrd

tmp_t

/tmp

/usr/tmp

/var/tmp

/var/tmp/vi.recover

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.