Re: user guide draft: "Examples: Booleans for NFS"

[Daniel J Walsh <dwalsh@redhat.com>]

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Murray McAllister wrote:
> Hi,
> 
> The following is a draft for the "Booleans" section. Any comments or
> corrections are appreciated:
> 
> Examples: Booleans for NFS and CIFS
> 
> By default, NFS mounts on the client side are labeled with a default
> context defined by policy for NFS file systems. In common policies, this
> default context uses the nfs_t type. Also, by default, Samba shares
> mounted on the client side are labeled with a default context defined by
> policy. In common policies, this default context uses the cifs_t type.
> 
> Depending on policy configuration, services, such as Apache HTTP Server
> and Samba, may not be able to read files labeled with the nfs_t or
> cifs_t types. This may prevent file systems labeled with these types
> from being mounted and then read or exported by other services. Booleans
> can be turned on or off to control which services are allowed to access
> the nfs_t and cifs_t types.
> 
> The setsebool and semanage commands must be run as the Linux root user.
> The setsebool -P command makes persistent changes. Do not use the -P
> option if you do not want changes to persist across reboots:
> 
> Apache HTTP Server
> 
> To allow access to NFS file systems (files labeled with the nfs_t type):
> /usr/sbin/setsebool -P httpd_use_nfs on
> 
> To allow access to Samba file systems (files labeled with the cifs_t type):
> /usr/sbin/setsebool -P httpd_use_cifs on
> 
> Samba
> 
> To export NFS file systems:
> /usr/sbin/setsebool -P samba_share_nfs on
> 
> FTP (vsftpd)
> 
> To allow access to NFS file systems:
> /usr/sbin/setsebool -P allow_ftpd_use_nfs on
> 
> Other Services
> 
> For a list of NFS related Booleans for other services:
> /usr/sbin/semanage boolean -l | grep nfs
> 
> For a list of Samba related Booleans for other services:
> /usr/sbin/semanage boolean -l | grep cifs
> 
> Thanks.
> 
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Looks good, only problem with describing booleans is that they might not
exist on all versions of policy.  The description above will require 5.3
policy on RHEL5.
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