squid_selinux(8) squid SELinux Policy documentation squid_selinux(8)NAMEsquid_selinux - Security Enhanced Linux Policy for the squid processes
DESCRIPTION
Security-Enhanced Linux secures the squid processes via flexible manda‐
tory access control.
BOOLEANS
SELinux policy is customizable based on least access required. squid
policy is extremely flexible and has several booleans that allow you to
manipulate the policy and run squid with the tightest access possible.
If you want to allow squid to run as a transparent proxy (TPROXY, you
must turn on the squid_use_tproxy boolean.
setsebool -P squid_use_tproxy 1
If you want to allow squid to connect to all ports, not just HTTP, FTP,
and Gopher ports, you must turn on the squid_connect_any boolean.
setsebool -P squid_connect_any 1
NSSWITCH DOMAIN
If you want to allow users to login using a sssd serve for the squid_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
squid_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 squid_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 squid policy is very flexible allowing users to setup their
squid processes in as secure a method as possible.
The following file types are defined for squid:
squid_cache_t
- Set files with the squid_cache_t type, if you want to store the files
under the /var/cache directory.
Paths:
/var/cache/squid(/.*)?, /var/spool/squid(/.*)?, /var/squid‐
Guard(/.*)?
squid_conf_t
- Set files with the squid_conf_t type, if you want to treat the files
as squid configuration data, usually stored under the /etc directory.
Paths:
/etc/squid(/.*)?, /usr/share/squid(/.*)?
squid_exec_t
- Set files with the squid_exec_t type, if you want to transition an
executable to the squid_t domain.
squid_initrc_exec_t
- Set files with the squid_initrc_exec_t type, if you want to transi‐
tion an executable to the squid_initrc_t domain.
squid_log_t
- Set files with the squid_log_t type, if you want to treat the data as
squid log data, usually stored under the /var/log directory.
Paths:
/var/log/squid(/.*)?, /var/log/squidGuard(/.*)?
squid_tmp_t
- Set files with the squid_tmp_t type, if you want to store squid tem‐
porary files in the /tmp directories.
squid_tmpfs_t
- Set files with the squid_tmpfs_t type, if you want to store squid
files on a tmpfs file system.
squid_var_run_t
- Set files with the squid_var_run_t type, if you want to store the
squid files under the /run directory.
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.
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 squid policy is very flexible allowing users to setup their
squid processes in as secure a method as possible.
The following port types are defined for squid:
squid_port_t
Default Defined Ports:
tcp 3128,3401,4827
udp 3401,4827
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
squid policy is very flexible allowing users to setup their squid pro‐
cesses in as secure a method as possible.
The following process types are defined for squid:
squid_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 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 autogenerated by genman.py.
SEE ALSOselinux(8), squid(8), semanage(8), restorecon(8), chcon(1) , setse‐
bool(8)dwalsh@redhat.com squid squid_selinux(8)
