iptables_selinux(8) - Linux man page

Name

iptables_selinux - Security Enhanced Linux Policy for the iptables processes

Description

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

The iptables processes execute with the iptables_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 iptables_t

Entrypoints

The iptables_t SELinux type can be entered via the "iptables_exec_t" file type. The default entrypoint paths for the iptables_t domain are the following:"

/sbin/ip6?tables.*, /sbin/ip6?tables-multi.*, /sbin/ip6?tables-restore.*, /sbin/ipchains.*, /usr/sbin/ipchains.*, /sbin/ipvsadm, /sbin/ebtables, /usr/sbin/iptables, /sbin/ipvsadm-save, /sbin/ipvsadm-restore, /sbin/ebtables-restore, /usr/sbin/iptables-multi, /usr/sbin/iptables-restore

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

The following process types are defined for iptables:

iptables_t

Note: semanage permissive -a iptables_t

can be used to make the process type iptables_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. iptables policy is extremely flexible and has several booleans that allow you to manipulate the policy and run iptables with the tightest access possible.

If you want to allow dhcpc client applications to execute iptables commands, you must turn on the dhcpc_exec_iptables boolean.

setsebool -P dhcpc_exec_iptables 1

If you want to allow dhcpc client applications to execute iptables commands, you must turn on the dhcpc_exec_iptables boolean.

setsebool -P dhcpc_exec_iptables 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 iptables policy is very flexible allowing users to setup their iptables processes in as secure a method as possible.

The following file types are defined for iptables:

iptables_exec_t

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

iptables_initrc_exec_t

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

iptables_tmp_t

- Set files with the iptables_tmp_t type, if you want to store iptables temporary files in the /tmp directories.

iptables_var_run_t

- Set files with the iptables_var_run_t type, if you want to store the iptables 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.

Managed Files

The SELinux process type iptables_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.

etc_runtime_t

/[^/]+

/etc/mtab.*

/etc/blkid(/.*)?

/etc/nologin.*

/etc/smartd.conf.*

/etc/.fstab.hal..+

/etc/sysconfig/ip6?tables.save

/halt

/etc/motd

/fastboot

/poweroff

/etc/issue

/etc/cmtab

/forcefsck

/.autofsck

/.suspended

/fsckoptions

/etc/HOSTNAME

/.autorelabel

/etc/securetty

/etc/nohotplug

/etc/issue.net

/etc/killpower

/etc/ioctl.save

/etc/reader.conf

/etc/fstab.REVOKE

/etc/mtab.fuselock

/etc/network/ifstate

/etc/sysconfig/hwconf

/etc/ptal/ptal-printd-like

/etc/xorg.conf.d/00-system-setup-keyboard.conf

initrc_tmp_t
iptables_tmp_t
iptables_var_run_t
mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

psad_tmp_t
psad_var_log_t

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

shorewall_var_lib_t

/var/lib/shorewall(/.*)?

/var/lib/shorewall6(/.*)?

/var/lib/shorewall-lite(/.*)?

system_conf_t

/etc/sysctl.conf(.old)?

/etc/sysconfig/ip6?tables.*

/etc/sysconfig/ipvsadm.*

/etc/sysconfig/ebtables.*

/etc/sysconfig/system-config-firewall.*

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 policy modules.

semanage boolean can also be used to manipulate the booleans

system-config-selinux is a GUI tool available to customize SELinux policy settings.

Author

This manual page was auto-generated using sepolicy manpage by mgrepl.