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<h1 align="center">tftpd_selinux</h1>
<a href="#NAME">NAME</a><br>
<a href="#DESCRIPTION">DESCRIPTION</a><br>
<a href="#ENTRYPOINTS">ENTRYPOINTS</a><br>
<a href="#PROCESS TYPES">PROCESS TYPES</a><br>
<a href="#BOOLEANS">BOOLEANS</a><br>
<a href="#PORT TYPES">PORT TYPES</a><br>
<a href="#MANAGED FILES">MANAGED FILES</a><br>
<a href="#FILE CONTEXTS">FILE CONTEXTS</a><br>
<a href="#SHARING FILES">SHARING FILES</a><br>
<a href="#COMMANDS">COMMANDS</a><br>
<a href="#AUTHOR">AUTHOR</a><br>
<a href="#SEE ALSO">SEE ALSO</a><br>
<hr>
<h2>NAME
<a name="NAME"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">tftpd_selinux
− Security Enhanced Linux Policy for the tftpd
processes</p>
<h2>DESCRIPTION
<a name="DESCRIPTION"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">Security-Enhanced
Linux secures the tftpd processes via flexible mandatory
access control.</p>
<p style="margin-left:11%; margin-top: 1em">The tftpd
processes execute with the tftpd_t SELinux type. You can
check if you have these processes running by executing the
<b>ps</b> command with the <b>−Z</b> qualifier.</p>
<p style="margin-left:11%; margin-top: 1em">For
example:</p>
<p style="margin-left:11%; margin-top: 1em"><b>ps -eZ |
grep tftpd_t</b></p>
<h2>ENTRYPOINTS
<a name="ENTRYPOINTS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The tftpd_t
SELinux type can be entered via the <b>tftpd_exec_t</b> file
type.</p>
<p style="margin-left:11%; margin-top: 1em">The default
entrypoint paths for the tftpd_t domain are the
following:</p>
<p style="margin-left:11%; margin-top: 1em">/usr/sbin/atftpd,
/usr/sbin/in.tftpd</p>
<h2>PROCESS TYPES
<a name="PROCESS TYPES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux defines
process types (domains) for each process running on the
system</p>
<p style="margin-left:11%; margin-top: 1em">You can see the
context of a process using the <b>−Z</b> option to
<b>ps</b></p>
<p style="margin-left:11%; margin-top: 1em">Policy governs
the access confined processes have to files. SELinux tftpd
policy is very flexible allowing users to setup their tftpd
processes in as secure a method as possible.</p>
<p style="margin-left:11%; margin-top: 1em">The following
process types are defined for tftpd:</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpd_t</b></p>
<p style="margin-left:11%; margin-top: 1em">Note:
<b>semanage permissive -a tftpd_t</b> can be used to make
the process type tftpd_t permissive. SELinux does not deny
access to permissive process types, but the AVC (SELinux
denials) messages are still generated.</p>
<h2>BOOLEANS
<a name="BOOLEANS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux policy
is customizable based on least access required. tftpd policy
is extremely flexible and has several booleans that allow
you to manipulate the policy and run tftpd with the tightest
access possible.</p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow tftp to read and write files in the user home
directories, you must turn on the tftp_home_dir boolean.
Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
tftp_home_dir 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
dontaudit all daemons scheduling requests (setsched,
sys_nice), you must turn on the daemons_dontaudit_scheduling
boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
daemons_dontaudit_scheduling 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow all domains to execute in fips_mode, you must turn on
the fips_mode boolean. Enabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
fips_mode 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow system to run with NIS, you must turn on the
nis_enabled boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
nis_enabled 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
support NFS home directories, you must turn on the
use_nfs_home_dirs boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
use_nfs_home_dirs 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
support SAMBA home directories, you must turn on the
use_samba_home_dirs boolean. Disabled by default.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
use_samba_home_dirs 1</b></p>
<h2>PORT TYPES
<a name="PORT TYPES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux defines
port types to represent TCP and UDP ports.</p>
<p style="margin-left:11%; margin-top: 1em">You can see the
types associated with a port by using the following
command:</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
port -l</b></p>
<p style="margin-left:11%; margin-top: 1em">Policy governs
the access confined processes have to these ports. SELinux
tftpd policy is very flexible allowing users to setup their
tftpd processes in as secure a method as possible.</p>
<p style="margin-left:11%; margin-top: 1em">The following
port types are defined for tftpd: <b><br>
tftp_port_t</b></p>
<p style="margin-left:11%; margin-top: 1em">Default Defined
Ports:</p>
<p style="margin-left:26%;">udp 69</p>
<h2>MANAGED FILES
<a name="MANAGED FILES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">The SELinux
process type tftpd_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.</p>
<p style="margin-left:11%; margin-top: 1em"><b>cifs_t</b></p>
<p style="margin-left:11%; margin-top: 1em"><b>cluster_conf_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/etc/cluster(/.*)?</p>
<p style="margin-left:11%; margin-top: 1em"><b>cluster_var_lib_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/var/lib/pcsd(/.*)?
<br>
/var/lib/cluster(/.*)? <br>
/var/lib/openais(/.*)? <br>
/var/lib/pengine(/.*)? <br>
/var/lib/corosync(/.*)? <br>
/usr/lib/heartbeat(/.*)? <br>
/var/lib/heartbeat(/.*)? <br>
/var/lib/pacemaker(/.*)?</p>
<p style="margin-left:11%; margin-top: 1em"><b>cluster_var_run_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/var/run/crm(/.*)?
<br>
/var/run/cman_.* <br>
/var/run/rsctmp(/.*)? <br>
/var/run/aisexec.* <br>
/var/run/heartbeat(/.*)? <br>
/var/run/pcsd-ruby.socket <br>
/var/run/corosync-qnetd(/.*)? <br>
/var/run/corosync-qdevice(/.*)? <br>
/var/run/pcsd.socket <br>
/var/run/corosync.pid <br>
/var/run/cpglockd.pid <br>
/var/run/rgmanager.pid <br>
/var/run/cluster/rgmanager.sk</p>
<p style="margin-left:11%; margin-top: 1em"><b>ecryptfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/home/[^/]+/.Private(/.*)?
<br>
/home/[^/]+/.ecryptfs(/.*)?</p>
<p style="margin-left:11%; margin-top: 1em"><b>fusefs_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/var/run/user/[0-9]+/gvfs</p>
<p style="margin-left:11%; margin-top: 1em"><b>krb5_host_rcache_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/var/tmp/krb5_0.rcache2
<br>
/var/cache/krb5rcache(/.*)? <br>
/var/tmp/nfs_0 <br>
/var/tmp/DNS_25 <br>
/var/tmp/host_0 <br>
/var/tmp/imap_0 <br>
/var/tmp/HTTP_23 <br>
/var/tmp/HTTP_48 <br>
/var/tmp/ldap_55 <br>
/var/tmp/ldap_487 <br>
/var/tmp/ldapmap1_0</p>
<p style="margin-left:11%; margin-top: 1em"><b>nfs_t</b></p>
<p style="margin-left:11%; margin-top: 1em"><b>root_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
<br>
/ <br>
/initrd</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpd_var_run_t</b></p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpdir_rw_t</b></p>
<p style="margin-left:11%; margin-top: 1em">/var/lib/tftpboot(/.*)?</p>
<h2>FILE CONTEXTS
<a name="FILE CONTEXTS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">SELinux
requires files to have an extended attribute to define the
file type.</p>
<p style="margin-left:11%; margin-top: 1em">You can see the
context of a file using the <b>−Z</b> option to
<b>ls</b></p>
<p style="margin-left:11%; margin-top: 1em">Policy governs
the access confined processes have to these files. SELinux
tftpd policy is very flexible allowing users to setup their
tftpd processes in as secure a method as possible.</p>
<p style="margin-left:11%; margin-top: 1em"><b>STANDARD
FILE CONTEXT</b></p>
<p style="margin-left:11%; margin-top: 1em">SELinux defines
the file context types for the tftpd, if you wanted to store
files with these types in a different paths, you need to
execute the semanage command to specify alternate labeling
and then use restorecon to put the labels on disk.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext -a -t tftpd_etc_t
’/srv/mytftpd_content(/.*)?’ <br>
restorecon -R -v /srv/mytftpd_content</b></p>
<p style="margin-left:11%; margin-top: 1em">Note: SELinux
often uses regular expressions to specify labels that match
multiple files.</p>
<p style="margin-left:11%; margin-top: 1em"><i>The
following file types are defined for tftpd:</i></p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpd_etc_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the tftpd_etc_t type, if you want to store tftpd files
in the /etc directories.</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpd_exec_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the tftpd_exec_t type, if you want to transition an
executable to the tftpd_t domain. <br>
Paths:</p>
<p style="margin-left:18%;">/usr/sbin/atftpd,
/usr/sbin/in.tftpd</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpd_var_run_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the tftpd_var_run_t type, if you want to store the
tftpd files under the /run or /var/run directory.</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpdir_rw_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the tftpdir_rw_t type, if you want to treat the files
as tftpdir read/write content.</p>
<p style="margin-left:11%; margin-top: 1em"><b>tftpdir_t</b></p>
<p style="margin-left:11%; margin-top: 1em">- Set files
with the tftpdir_t type, if you want to treat the files as
tftpdir data. <br>
Paths:</p>
<p style="margin-left:18%;">/tftpboot/.*, /tftpboot</p>
<p style="margin-left:11%; margin-top: 1em">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 <b>semanage fcontext</b> command. This will
modify the SELinux labeling database. You will need to use
<b>restorecon</b> to apply the labels.</p>
<h2>SHARING FILES
<a name="SHARING FILES"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">If you want to
share files with multiple domains (Apache, FTP, rsync,
Samba), you can set a file context of public_content_t and
public_content_rw_t. These context allow any of the above
domains to read the content. If you want a particular domain
to write to the public_content_rw_t domain, you must set the
appropriate boolean. <br>
Allow tftpd servers to read the /var/tftpd directory by
adding the <br>
public_content_t file type to the directory and by restoring
the file <br>
type.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext -a -t public_content_t "/var/tftpd(/.*)?"
<br>
restorecon -F -R -v /var/tftpd</b> <br>
Allow tftpd servers to read and write /var/tftpd/incoming by
adding the <br>
public_content_rw_t type to the directory and by restoring
the file <br>
type. You also need to turn on the tftpd_anon_write
boolean.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext -a -t public_content_rw_t
"/var/tftpd/incoming(/.*)?" <br>
restorecon -F -R -v /var/tftpd/incoming <br>
setsebool -P tftpd_anon_write 1</b></p>
<p style="margin-left:11%; margin-top: 1em">If you want to
allow tftp to modify public files used for public file
transfer services., you must turn on the tftp_anon_write
boolean.</p>
<p style="margin-left:11%; margin-top: 1em"><b>setsebool -P
tftp_anon_write 1</b></p>
<h2>COMMANDS
<a name="COMMANDS"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
fcontext</b> can also be used to manipulate default file
context mappings.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
permissive</b> can also be used to manipulate whether or not
a process type is permissive.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
module</b> can also be used to enable/disable/install/remove
policy modules.</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
port</b> can also be used to manipulate the port
definitions</p>
<p style="margin-left:11%; margin-top: 1em"><b>semanage
boolean</b> can also be used to manipulate the booleans</p>
<p style="margin-left:11%; margin-top: 1em"><b>system-config-selinux</b>
is a GUI tool available to customize SELinux policy
settings.</p>
<h2>AUTHOR
<a name="AUTHOR"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">This manual
page was auto-generated using <b>sepolicy manpage .</b></p>
<h2>SEE ALSO
<a name="SEE ALSO"></a>
</h2>
<p style="margin-left:11%; margin-top: 1em">selinux(8),
tftpd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8),
setsebool(8)</p>
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