krb5kdc_selinux(8) - Linux man page

Name

krb5kdc_selinux - Security Enhanced Linux Policy for the krb5kdc processes

Description

Security-Enhanced Linux secures the krb5kdc processes via flexible mandatory access control.

The krb5kdc processes execute with the krb5kdc_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 krb5kdc_t

Entrypoints

The krb5kdc_t SELinux type can be entered via the "krb5kdc_exec_t" file type. The default entrypoint paths for the krb5kdc_t domain are the following:"

/usr/(local/)?(kerberos/)?sbin/krb5kdc

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 krb5kdc policy is very flexible allowing users to setup their krb5kdc processes in as secure a method as possible.

The following process types are defined for krb5kdc:

krb5kdc_t

Note: semanage permissive -a krb5kdc_t

can be used to make the process type krb5kdc_t permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.

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 krb5kdc policy is very flexible allowing users to setup their krb5kdc processes in as secure a method as possible.

The following file types are defined for krb5kdc:

krb5kdc_conf_t

- Set files with the krb5kdc_conf_t type, if you want to treat the files as krb5kdc configuration data, usually stored under the /etc directory.

krb5kdc_exec_t

- Set files with the krb5kdc_exec_t type, if you want to transition an executable to the krb5kdc_t domain.

krb5kdc_lock_t

- Set files with the krb5kdc_lock_t type, if you want to treat the files as krb5kdc lock data, stored under the /var/lock directory

krb5kdc_log_t

- Set files with the krb5kdc_log_t type, if you want to treat the data as krb5kdc log data, usually stored under the /var/log directory.

krb5kdc_principal_t

- Set files with the krb5kdc_principal_t type, if you want to treat the files as krb5kdc principal data.

krb5kdc_tmp_t

- Set files with the krb5kdc_tmp_t type, if you want to store krb5kdc temporary files in the /tmp directories.

krb5kdc_var_run_t

- Set files with the krb5kdc_var_run_t type, if you want to store the krb5kdc 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.

Managed Files

The SELinux process type krb5kdc_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.

anon_inodefs_t

initrc_tmp_t

krb5kdc_lock_t

/var/kerberos/krb5kdc/principal.*.ok

/var/kerberos/krb5kdc/from_master.*

krb5kdc_log_t

/var/log/krb5kdc.log.*

krb5kdc_principal_t

/etc/krb5kdc/principal.*

/var/kerberos/krb5kdc/principal.*

/usr/local/var/krb5kdc/principal.*

krb5kdc_tmp_t
krb5kdc_var_run_t
mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

root_t

/initrd

security_t
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.

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.