cobblerd_selinux(8)SELinux Policy documentation for cobblercobblerd_selinux(8)

NAME cobblerd_selinux - Security Enhanced Linux Policy for the cobblerd pro- cesses

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

The cobblerd processes execute with the cobblerd_t SELinux type. You can check if you have these processes running by executing the ps com- mand with the -Z qualifier.

For example:

ps -eZ | grep cobblerd_t

ENTRYPOINTS The cobblerd_t SELinux type can be entered via the "cobblerd_exec_t" file type. The default entrypoint paths for the cobblerd_t domain are the following:"

/usr/bin/cobblerd

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

The following process types are defined for cobblerd:

cobblerd_t

Note: semanage permissive -a cobblerd_t

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

BOOLEANS SELinux policy is customizable based on least access required. cob- blerd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run cobblerd with the tightest access possible.

If you want to allow Cobbler to access nfs file systems, you must turn on the cobbler_use_nfs boolean.

setsebool -P cobbler_use_nfs 1

If you want to allow Cobbler to connect to the network using TCP, you must turn on the cobbler_can_network_connect boolean.

setsebool -P cobbler_can_network_connect 1

If you want to allow HTTPD scripts and modules to connect to cobbler over the network, you must turn on the httpd_can_network_connect_cob- bler boolean.

setsebool -P httpd_can_network_connect_cobbler 1

If you want to allow Cobbler to access cifs file systems, you must turn on the cobbler_use_cifs boolean.

setsebool -P cobbler_use_cifs 1

If you want to allow Cobbler to modify public files used for public file transfer services, you must turn on the cobbler_anon_write boolean.

setsebool -P cobbler_anon_write 1

If you want to allow Cobbler to access nfs file systems, you must turn on the cobbler_use_nfs boolean.

setsebool -P cobbler_use_nfs 1

If you want to allow Cobbler to connect to the network using TCP, you must turn on the cobbler_can_network_connect boolean.

setsebool -P cobbler_can_network_connect 1

If you want to allow HTTPD scripts and modules to connect to cobbler over the network, you must turn on the httpd_can_network_connect_cob- bler boolean.

setsebool -P httpd_can_network_connect_cobbler 1

If you want to allow Cobbler to access cifs file systems, you must turn on the cobbler_use_cifs boolean.

setsebool -P cobbler_use_cifs 1

SHARING FILES 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_con- tent_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_con- tent_rw_t domain, you must set the appropriate boolean.

Allow cobblerd servers to read the /var/cobblerd directory by adding the public_content_t file type to the directory and by restoring the file type.

semanage fcontext -a -t public_content_t "/var/cobblerd(/.*)?" restorecon -F -R -v /var/cobblerd

Allow cobblerd servers to read and write /var/tmp/incoming by adding the public_content_rw_t type to the directory and by restoring the file type. This also requires the allow_cobblerdd_anon_write boolean to be set.

semanage fcontext -a -t public_content_rw_t "/var/cobblerd/incom- ing(/.*)?" restorecon -F -R -v /var/cobblerd/incoming

If you want to allow Cobbler to modify public files used for public file transfer services., you must turn on the cobbler_anon_write boolean.

setsebool -P cobbler_anon_write 1

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

The following file types are defined for cobblerd:

cobblerd_exec_t

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

cobblerd_initrc_exec_t

- Set files with the cobblerd_initrc_exec_t type, if you want to tran- sition an executable to the cobblerd_initrc_t domain.

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.

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

The following port types are defined for cobblerd:

cobbler_port_t

Default Defined Ports: tcp 25151

MANAGED FILES The SELinux process type cobblerd_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.

cobbler_tmp_t

cobbler_var_lib_t

/var/lib/cobbler(/.*)? /var/www/cobbler/pub(/.*)? /var/lib/tftpboot/etc(/.*)? /var/lib/tftpboot/ppc(/.*)? /var/lib/tftpboot/grub(/.*)? /var/www/cobbler/links(/.*)? /var/lib/tftpboot/s390x(/.*)? /var/www/cobbler/images(/.*)? /var/lib/tftpboot/images(/.*)? /var/www/cobbler/rendered(/.*)? /var/www/cobbler/ks_mirror(/.*)? /var/www/cobbler/localmirror(/.*)? /var/www/cobbler/repo_mirror(/.*)? /var/lib/tftpboot/pxelinux.cfg(/.*)? /var/lib/tftpboot/yaboot /var/lib/tftpboot/memdisk /var/lib/tftpboot/menu.c32 /var/lib/tftpboot/pxelinux.0

cobbler_var_log_t

/var/log/cobbler(/.*)?

dhcp_etc_t

/etc/dhcpc.* /etc/dhcp3(/.*)? /etc/dhcpd(6)?.conf /etc/dhcp3?/dhclient.* /etc/dhclient.*conf /etc/dhcp/dhcpd(6)?.conf /etc/dhclient-script

dnsmasq_etc_t

/etc/dnsmasq.conf

httpd_cobbler_rw_content_t

initrc_tmp_t

mnt_t

/mnt(/[^/]*) /mnt(/[^/]*)? /rhev(/[^/]*)? /media(/[^/]*) /media(/[^/]*)? /etc/rhgb(/.*)? /media/.hal-.* /net /afs /misc /rhev

named_conf_t

/etc/rndc.* /etc/unbound(/.*)? /var/named/chroot(/.*)? /etc/named.rfc1912.zones /var/named/chroot/etc/named.rfc1912.zones /etc/named.conf /var/named/named.ca /etc/named.root.hints /var/named/chroot/etc/named.conf /etc/named.caching-nameserver.conf /var/named/chroot/var/named/named.ca /var/named/chroot/etc/named.root.hints /var/named/chroot/etc/named.caching-nameserver.conf

named_zone_t

/var/named(/.*)? /var/named/chroot/var/named(/.*)?

net_conf_t

/etc/ntpd?.conf.* /etc/yp.conf.* /etc/denyhosts.* /etc/hosts.deny.* /etc/resolv.conf.* /etc/ntp/step-tickers.* /etc/sysconfig/networking(/.*)? /etc/sysconfig/network-scripts(/.*)? /etc/sysconfig/network-scripts/.*resolv.conf /etc/hosts /etc/ethers

root_t

/ /initrd

rsync_etc_t

/etc/rsyncd.conf

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 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 by mgrepl.

SEE ALSO selinux(8), cobblerd(8), semanage(8), restorecon(8), chcon(1), sepol- icy(8) , setsebool(8)

cobblerd 13-01-04 cobblerd_selinux(8)