rlogind_selinux(8) SELinux Policy rlogind rlogind_selinux(8)NAMErlogind_selinux - Security Enhanced Linux Policy for the rlogind pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the rlogind processes via flexible
mandatory access control.
The rlogind processes execute with the rlogind_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 rlogind_t
ENTRYPOINTS
The rlogind_t SELinux type can be entered via the rlogind_exec_t file
type.
The default entrypoint paths for the rlogind_t domain are the follow‐
ing:
/usr/lib/telnetlogin, /usr/sbin/in.rlogind, /usr/kerberos/sbin/klogind
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
rlogind policy is very flexible allowing users to setup their rlogind
processes in as secure a method as possible.
The following process types are defined for rlogind:
rlogind_t
Note: semanage permissive -a rlogind_t can be used to make the process
type rlogind_t permissive. SELinux does not deny access to permissive
process types, but the AVC (SELinux denials) messages are still gener‐
ated.
BOOLEANS
SELinux policy is customizable based on least access required. rlogind
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run rlogind with the tightest access possi‐
ble.
If you want to allow users to resolve user passwd entries directly from
ldap rather then using a sssd server, you must turn on the authlo‐
gin_nsswitch_use_ldap boolean. Disabled by default.
setsebool -P authlogin_nsswitch_use_ldap 1
If you want to allow users to login using a radius server, you must
turn on the authlogin_radius boolean. Disabled by default.
setsebool -P authlogin_radius 1
If you want to allow users to login using a yubikey server, you must
turn on the authlogin_yubikey boolean. Disabled by default.
setsebool -P authlogin_yubikey 1
If you want to deny any process from ptracing or debugging any other
processes, you must turn on the deny_ptrace boolean. Enabled by
default.
setsebool -P deny_ptrace 1
If you want to allow all domains to use other domains file descriptors,
you must turn on the domain_fd_use boolean. Enabled by default.
setsebool -P domain_fd_use 1
If you want to allow all domains to have the kernel load modules, you
must turn on the domain_kernel_load_modules boolean. Disabled by
default.
setsebool -P domain_kernel_load_modules 1
If you want to allow all domains to execute in fips_mode, you must turn
on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
If you want to enable reading of urandom for all domains, you must turn
on the global_ssp boolean. Disabled by default.
setsebool -P global_ssp 1
If you want to allow confined applications to run with kerberos, you
must turn on the kerberos_enabled boolean. Enabled by default.
setsebool -P kerberos_enabled 1
If you want to allow system to run with NIS, you must turn on the
nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1
If you want to allow confined applications to use nscd shared memory,
you must turn on the nscd_use_shm boolean. Disabled by default.
setsebool -P nscd_use_shm 1
If you want to enable polyinstantiated directory support, you must turn
on the polyinstantiation_enabled boolean. Disabled by default.
setsebool -P polyinstantiation_enabled 1
If you want to support ecryptfs home directories, you must turn on the
use_ecryptfs_home_dirs boolean. Disabled by default.
setsebool -P use_ecryptfs_home_dirs 1
If you want to support fusefs home directories, you must turn on the
use_fusefs_home_dirs boolean. Disabled by default.
setsebool -P use_fusefs_home_dirs 1
If you want to support NFS home directories, you must turn on the
use_nfs_home_dirs boolean. Disabled by default.
setsebool -P use_nfs_home_dirs 1
If you want to support SAMBA home directories, you must turn on the
use_samba_home_dirs boolean. Disabled by default.
setsebool -P use_samba_home_dirs 1
NSSWITCH DOMAIN
If you want to allow users to resolve user passwd entries directly from
ldap rather then using a sssd server for the rlogind_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
rlogind_t, you must turn on the kerberos_enabled boolean.
setsebool -P kerberos_enabled 1
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 rlogind policy is very flexible allowing users to setup their
rlogind processes in as secure a method as possible.
The following port types are defined for rlogind:
rlogin_port_t
Default Defined Ports:
tcp 543,2105
rlogind_port_t
Default Defined Ports:
tcp 513
MANAGED FILES
The SELinux process type rlogind_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.
auth_cache_t
/var/cache/coolkey(/.*)?
auth_home_t
/root/.yubico(/.*)?
/root/.google_authenticator
/root/.google_authenticator~
/home/[^/]*/.yubico(/.*)?
/home/[^/]*/.google_authenticator
/home/[^/]*/.google_authenticator~
cgroup_t
/cgroup(/.*)?
/sys/fs/cgroup(/.*)?
faillog_t
/var/log/btmp.*
/var/log/faillog.*
/var/log/tallylog.*
/var/run/faillock(/.*)?
initrc_var_run_t
/var/run/utmp
/var/run/random-seed
/var/run/runlevel.dir
/var/run/setmixer_flag
krb5_host_rcache_t
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0
lastlog_t
/var/log/lastlog.*
pam_var_run_t
/var/(db|lib|adm)/sudo(/.*)?
/var/run/sudo(/.*)?
/var/run/sepermit(/.*)?
/var/run/pam_mount(/.*)?
rlogind_tmp_t
rlogind_var_run_t
security_t
/selinux
user_tmp_t
/var/run/user(/.*)?
/tmp/gconfd-.*
var_auth_t
/var/ace(/.*)?
/var/rsa(/.*)?
/var/lib/abl(/.*)?
/var/lib/rsa(/.*)?
/var/lib/pam_ssh(/.*)?
/var/run/pam_ssh(/.*)?
/var/lib/pam_shield(/.*)?
/var/opt/quest/vas/vasd(/.*)?
/var/lib/google-authenticator(/.*)?
wtmp_t
/var/log/wtmp.*
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 rlogind policy is very flexible allowing users to setup their
rlogind processes in as secure a method as possible.
STANDARD FILE CONTEXT
SELinux defines the file context types for the rlogind, if you wanted
to store files with these types in a diffent paths, you need to execute
the semanage command to sepecify alternate labeling and then use
restorecon to put the labels on disk.
semanage fcontext -a -t rlogind_exec_t '/srv/rlogind/content(/.*)?'
restorecon -R -v /srv/myrlogind_content
Note: SELinux often uses regular expressions to specify labels that
match multiple files.
The following file types are defined for rlogind:
rlogind_exec_t
- Set files with the rlogind_exec_t type, if you want to transition an
executable to the rlogind_t domain.
Paths:
/usr/lib/telnetlogin, /usr/sbin/in.rlogind, /usr/ker‐
beros/sbin/klogind
rlogind_home_t
- Set files with the rlogind_home_t type, if you want to store rlogind
files in the users home directory.
Paths:
/root/.rlogin, /root/.rhosts, /home/[^/]*/.rlogin,
/home/[^/]*/.rhosts
rlogind_keytab_t
- Set files with the rlogind_keytab_t type, if you want to treat the
files as kerberos keytab files.
rlogind_tmp_t
- Set files with the rlogind_tmp_t type, if you want to store rlogind
temporary files in the /tmp directories.
rlogind_var_run_t
- Set files with the rlogind_var_run_t type, if you want to store the
rlogind files under the /run or /var/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 data‐
base. You will need to use restorecon to apply the labels.
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 pol‐
icy 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 pol‐
icy settings.
AUTHOR
This manual page was auto-generated using sepolicy manpage .
SEE ALSOselinux(8), rlogind(8), semanage(8), restorecon(8), chcon(1), sepol‐
icy(8) , setsebool(8)rlogind 13-11-20 rlogind_selinux(8)
