Security Enhanced Linux Reference Policy

### Global tunables:

allow_execheap

##### Default value

false

##### Description

Allow unconfined executables to make their heap memory executable. Doing this is a really bad idea. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla

allow_execmem

##### Default value

false

##### Description

Allow unconfined executables to map a memory region as both executable and writable, this is dangerous and the executable should be reported in bugzilla")

allow_execmod

##### Default value

false

##### Description

Allow all unconfined executables to use libraries requiring text relocation that are not labeled textrel_shlib_t")

allow_execstack

##### Default value

false

##### Description

Allow unconfined executables to make their stack executable. This should never, ever be necessary. Probably indicates a badly coded executable, but could indicate an attack. This executable should be reported in bugzilla")

allow_polyinstantiation

##### Default value

false

##### Description

Enable polyinstantiated directory support.

allow_ypbind

##### Default value

false

##### Description

Allow system to run with NIS

console_login

##### Default value

true

##### Description

Allow logging in and using the system from /dev/console.

deny_ptrace

##### Default value

false

##### Description

Allow sysadm to debug or ptrace all processes.

global_ssp

##### Default value

false

##### Description

Enable reading of urandom for all domains.

This should be enabled when all programs are compiled with ProPolice/SSP stack smashing protection. All domains will be allowed to read from /dev/urandom.

mail_read_content

##### Default value

false

##### Description

Allow email client to various content. nfs, samba, removable devices, and user temp files

nfs_export_all_ro

##### Default value

false

##### Description

Allow any files/directories to be exported read/only via NFS.

nfs_export_all_rw

##### Default value

false

##### Description

Allow any files/directories to be exported read/write via NFS.

use_nfs_home_dirs

##### Default value

false

##### Description

Support NFS home directories

use_samba_home_dirs

##### Default value

false

##### Description

Support SAMBA home directories

user_tcp_server

##### Default value

false

##### Description

Allow users to run TCP servers (bind to ports and accept connection from the same domain and outside users) disabling this forces FTP passive mode and may change other protocols.