sendmail_selinux(8) sendmail SELinux Policy documentation sendmail_selinux(8)NAMEsendmail_selinux - Security Enhanced Linux Policy for the sendmail pro‐
cesses
DESCRIPTION
Security-Enhanced Linux secures the sendmail processes via flexible
mandatory access control.
BOOLEANS
SELinux policy is customizable based on least access required. send‐
mail policy is extremely flexible and has several booleans that allow
you to manipulate the policy and run sendmail with the tightest access
possible.
If you want to allow http daemon to send mai, you must turn on the
httpd_can_sendmail boolean.
setsebool -P httpd_can_sendmail 1
If you want to allow syslogd daemon to send mai, you must turn on the
logging_syslogd_can_sendmail boolean.
setsebool -P logging_syslogd_can_sendmail 1
If you want to allow gitisis daemon to send mai, you must turn on the
gitosis_can_sendmail boolean.
setsebool -P gitosis_can_sendmail 1
NSSWITCH DOMAIN
If you want to allow users to login using a sssd serve for the send‐
mail_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
sendmail_t, you must turn on the allow_kerberos boolean.
setsebool -P allow_kerberos 1
If you want to allow system to run with NI for the sendmail_t, you must
turn on the allow_ypbind boolean.
setsebool -P allow_ypbind 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 sendmail policy is very flexible allowing users to setup their
sendmail processes in as secure a method as possible.
The following file types are defined for sendmail:
sendmail_exec_t
- Set files with the sendmail_exec_t type, if you want to transition an
executable to the sendmail_t domain.
Paths:
/usr/bin/mail(x)?, /usr/sbin/rmail, /usr/sbin/ssmtp,
/usr/bin/esmtp, /var/qmail/bin/sendmail, /usr/sbin/sendmail.post‐
fix, /usr/lib/courier/bin/sendmail, /usr/lib/sendmail,
/bin/mail(x)?, /usr/sbin/sendmail(.sendmail)?
sendmail_initrc_exec_t
- Set files with the sendmail_initrc_exec_t type, if you want to tran‐
sition an executable to the sendmail_initrc_t domain.
sendmail_keytab_t
- Set files with the sendmail_keytab_t type, if you want to treat the
files as kerberos keytab files.
sendmail_log_t
- Set files with the sendmail_log_t type, if you want to treat the data
as sendmail log data, usually stored under the /var/log directory.
Paths:
/var/log/sendmail.st, /var/log/mail(/.*)?
sendmail_tmp_t
- Set files with the sendmail_tmp_t type, if you want to store sendmail
temporary files in the /tmp directories.
sendmail_var_run_t
- Set files with the sendmail_var_run_t type, if you want to store the
sendmail files under the /run directory.
Paths:
/var/run/sendmail.pid, /var/run/sm-client.pid
Note: File context can be temporarily modified with the chcon command.
If you want to permanantly 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.
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
sendmail policy is very flexible allowing users to setup their sendmail
processes in as secure a method as possible.
The following process types are defined for sendmail:
sendmail_t
Note: semanage permissive -a PROCESS_TYPE can be used to make a process
type permissive. Permissive process types are not denied access by
SELinux. AVC messages will still be generated.
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 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 autogenerated by genman.py.
SEE ALSOselinux(8), sendmail(8), semanage(8), restorecon(8), chcon(1) , setse‐
bool(8)dwalsh@redhat.com sendmail sendmail_selinux(8)
