pppd_selinux(8) - Linux man page

Name

pppd_selinux - Security Enhanced Linux Policy for the pppd processes

Description

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

The pppd processes execute with the pppd_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 pppd_t

Entrypoints

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

/usr/sbin/pppd, /sbin/ppp-watch, /usr/sbin/ipppd, /sbin/pppoe-server

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

The following process types are defined for pppd:

pppd_t

Note: semanage permissive -a pppd_t

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

If you want to allow pppd to load kernel modules for certain modems, you must turn on the pppd_can_insmod boolean.

setsebool -P pppd_can_insmod 1

If you want to allow pppd to be run for a regular user, you must turn on the pppd_for_user boolean.

setsebool -P pppd_for_user 1

If you want to allow pppd to load kernel modules for certain modems, you must turn on the pppd_can_insmod boolean.

setsebool -P pppd_can_insmod 1

If you want to allow pppd to be run for a regular user, you must turn on the pppd_for_user boolean.

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

The following file types are defined for pppd:

pppd_etc_rw_t

- Set files with the pppd_etc_rw_t type, if you want to treat the files as pppd etc read/write content.

pppd_etc_t

- Set files with the pppd_etc_t type, if you want to store pppd files in the /etc directories.

pppd_exec_t

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

pppd_initrc_exec_t

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

pppd_lock_t

- Set files with the pppd_lock_t type, if you want to treat the files as pppd lock data, stored under the /var/lock directory

pppd_log_t

- Set files with the pppd_log_t type, if you want to treat the data as pppd log data, usually stored under the /var/log directory.

pppd_secret_t

- Set files with the pppd_secret_t type, if you want to treat the files as pppd se secret data.

pppd_tmp_t

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

pppd_var_run_t

- Set files with the pppd_var_run_t type, if you want to store the pppd 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 pppd_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

faillog_t

/var/log/btmp.*

/var/log/faillog.*

/var/log/tallylog.*

/var/run/faillock(/.*)?

initrc_tmp_t
mnt_t

/mnt(/[^/]*)

/mnt(/[^/]*)?

/rhev(/[^/]*)?

/media(/[^/]*)

/media(/[^/]*)?

/etc/rhgb(/.*)?

/media/.hal-.*

/net

/afs

/misc

/rhev

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

pcscd_var_run_t

/var/run/pcscd.events(/.*)?

/var/run/pcscd.pid

/var/run/pcscd.pub

/var/run/pcscd.comm

pppd_etc_rw_t

/etc/ppp(/.*)?

/etc/ppp/peers(/.*)?

/etc/ppp/resolv.conf

pppd_lock_t
pppd_log_t

/var/log/ppp/.*

/var/log/ppp-connect-errors.*

pppd_tmp_t
pppd_var_run_t

/var/run/(i)?ppp.*pid[^/]*

/var/run/ppp(/.*)?

/var/run/pppd[0-9]*.tdb

root_t

/initrd

tmp_t

/tmp

/usr/tmp

/var/tmp

/var/tmp/vi.recover

wtmp_t

/var/log/wtmp.*

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.