NAME¶

nx_server_ssh_selinux - Security Enhanced Linux Policy for the nx_server_ssh processes

DESCRIPTION¶

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

The nx_server_ssh processes execute with the nx_server_ssh_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 nx_server_ssh_t

ENTRYPOINTS¶

The nx_server_ssh_t SELinux type can be entered via the ssh_exec_t file type.

The default entrypoint paths for the nx_server_ssh_t domain are the following:

/usr/bin/ssh

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

The following process types are defined for nx_server_ssh:

nx_server_ssh_t

Note: semanage permissive -a nx_server_ssh_t can be used to make the process type nx_server_ssh_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.

BOOLEANS¶

SELinux policy is customizable based on least access required. nx_server_ssh policy is extremely flexible and has several booleans that allow you to manipulate the policy and run nx_server_ssh with the tightest access possible.

If you want to allow all domains to use other domains file descriptors, you must turn on the allow_domain_fd_use boolean. Enabled by default.

setsebool -P allow_domain_fd_use 1

If you want to allow confined applications to run with kerberos, you must turn on the allow_kerberos boolean. Enabled by default.

setsebool -P allow_kerberos 1

If you want to allow sysadm to debug or ptrace all processes, you must turn on the allow_ptrace boolean. Disabled by default.

setsebool -P allow_ptrace 1

If you want to allow system to run with NIS, you must turn on the allow_ypbind boolean. Disabled by default.

setsebool -P allow_ypbind 1

If you want to allow all domains to have the kernel load modules, you must turn on the domain_kernel_load_modules boolean. Disabled by default.

setsebool -P domain_kernel_load_modules 1

If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.

setsebool -P fips_mode 1

If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.

setsebool -P global_ssp 1

If you want to allow confined applications to use nscd shared memory, you must turn on the nscd_use_shm boolean. Enabled by default.

setsebool -P nscd_use_shm 1

MANAGED FILES¶

The SELinux process type nx_server_ssh_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.

initrc_tmp_t

mnt_t

/mnt(/[^/]*)
/mnt(/[^/]*)?
/rhev(/[^/]*)?
/media(/[^/]*)
/media(/[^/]*)?
/etc/rhgb(/.*)?
/media/.hal-.*
/net
/afs
/rhev
/misc

ssh_home_t

/root/.ssh(/.*)?
/var/lib/gitolite(3)?/.ssh(/.*)?
/var/lib/pgsql/.ssh(/.*)?
/var/lib/openshift/[^/]+/.ssh(/.*)?
/var/lib/amanda/.ssh(/.*)?
/var/lib/stickshift/[^/]+/.ssh(/.*)?
/root/.shosts
/home/[^/]*/.ssh(/.*)?
/home/[^/]*/.shosts
/home/staff/.ssh(/.*)?
/home/staff/.shosts

tmp_t

/tmp
/usr/tmp
/var/tmp
/tmp-inst
/var/tmp-inst
/var/tmp/vi.recover

user_tmp_t

/tmp/gconfd-.*
/tmp/gconfd-staff

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 .

SEE ALSO¶

selinux(8), nx_server_ssh(8), semanage(8), restorecon(8), chcon(1) , setsebool(8)