Security-Enhanced Linux secures the tor processes via flexible mandatory access control.
If you want to allow tor daemon to bind tcp sockets to all unreserved ports, you must turn on the tor_bind_all_unreserved_ports boolean.
setsebool -P tor_bind_all_unreserved_ports 1
If you want to allow users to resolve user passwd entries directly from ldap rather then using a sssd serve for the tor_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 tor_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
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 tor policy is very flexible allowing users to setup their tor processes in as secure a method as possible.
The following file types are defined for tor:
tor_etc_t
- Set files with the tor_etc_t type, if you want to store tor files in the /etc directories.
tor_exec_t
- Set files with the tor_exec_t type, if you want to transition an executable to the tor_t domain.
tor_initrc_exec_t
- Set files with the tor_initrc_exec_t type, if you want to transition an executable to the tor_initrc_t domain.
tor_unit_file_t
- Set files with the tor_unit_file_t type, if you want to treat the files as tor unit content.
tor_var_lib_t
- Set files with the tor_var_lib_t type, if you want to store the tor files under the /var/lib directory.
tor_var_log_t
- Set files with the tor_var_log_t type, if you want to treat the data as tor var log data, usually stored under the /var/log directory.
tor_var_run_t
- Set files with the tor_var_run_t type, if you want to store the tor 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.
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 tor policy is very flexible allowing users to setup their tor processes in as secure a method as possible.
The following port types are defined for tor:
Default Defined Ports: tcp 6969,9001,9030,9051
Default Defined Ports: tcp 9050
You can see the context of a process using the -Z option to psP Policy governs the access confined processes have to files. SELinux tor policy is very flexible allowing users to setup their tor processes in as secure a method as possible.
The following process types are defined for tor:
tor_t
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