greylist_selinux (8) - Linux Manuals
greylist_selinux: Security Enhanced Linux Policy for the greylist processes
NAMEgreylist_selinux - Security Enhanced Linux Policy for the greylist processes
Security-Enhanced Linux secures the greylist processes via flexible mandatory access control.
If you want to allow users to login using a sssd serve for the greylist_milter_t, you must turn on the authlogin_nsswitch_use_ldap boolean.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow confined applications to run with kerberos for the greylist_milter_t, you must turn on the allow_kerberos boolean.
setsebool -P allow_kerberos 1
If you want to allow system to run with NI for the greylist_milter_t, you must turn on the allow_ypbind boolean.
setsebool -P allow_ypbind 1
FILE CONTEXTSSELinux 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 lsP Policy governs the access confined processes have to these files. SELinux greylist policy is very flexible allowing users to setup their greylist processes in as secure a method as possible.
The following file types are defined for greylist:
- Set files with the greylist_milter_data_t type, if you want to treat the files as greylist milter content.
/var/run/milter-greylist.pid, /var/run/milter-greylist(/.*)?, /var/lib/milter-greylist(/.*)?
- Set files with the greylist_milter_exec_t type, if you want to transition an executable to the greylist_milter_t domain.
Note: File context can be temporarily modified with the chcon command. If you want to permanantly 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.
PROCESS TYPESSELinux defines process types (domains) for each process running on the system
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux greylist policy is very flexible allowing users to setup their greylist processes in as secure a method as possible.
The following process types are defined for greylist:
Note: semanage permissive -a PROCESS_TYPE can be used to make a process type permissive. Permissive process types are not denied access by SELinux. AVC messages will still be generated.
COMMANDSsemanage 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.