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<!-- Creator : groff version 1.22.3 --> <!-- CreationDate: Thu Feb 18 12:18:01 2016 --> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"> <meta name="Content-Style" content="text/css"> <style type="text/css"> p { margin-top: 0; margin-bottom: 0; vertical-align: top } pre { margin-top: 0; margin-bottom: 0; vertical-align: top } table { margin-top: 0; margin-bottom: 0; vertical-align: top } h1 { text-align: center } </style> <title>qmail_smtpd_selinux</title> </head> <body> <h1 align="center">qmail_smtpd_selinux</h1> <a href="#NAME">NAME</a><br> <a href="#DESCRIPTION">DESCRIPTION</a><br> <a href="#ENTRYPOINTS">ENTRYPOINTS</a><br> <a href="#PROCESS TYPES">PROCESS TYPES</a><br> <a href="#BOOLEANS">BOOLEANS</a><br> <a href="#FILE CONTEXTS">FILE CONTEXTS</a><br> <a href="#COMMANDS">COMMANDS</a><br> <a href="#AUTHOR">AUTHOR</a><br> <a href="#SEE ALSO">SEE ALSO</a><br> <hr> <h2>NAME <a name="NAME"></a> </h2> <p style="margin-left:11%; margin-top: 1em">qmail_smtpd_selinux − Security Enhanced Linux Policy for the qmail_smtpd processes</p> <h2>DESCRIPTION <a name="DESCRIPTION"></a> </h2> <p style="margin-left:11%; margin-top: 1em">Security-Enhanced Linux secures the qmail_smtpd processes via flexible mandatory access control.</p> <p style="margin-left:11%; margin-top: 1em">The qmail_smtpd processes execute with the qmail_smtpd_t SELinux type. You can check if you have these processes running by executing the <b>ps</b> command with the <b>−Z</b> qualifier.</p> <p style="margin-left:11%; margin-top: 1em">For example:</p> <p style="margin-left:11%; margin-top: 1em"><b>ps -eZ | grep qmail_smtpd_t</b></p> <h2>ENTRYPOINTS <a name="ENTRYPOINTS"></a> </h2> <p style="margin-left:11%; margin-top: 1em">The qmail_smtpd_t SELinux type can be entered via the <b>qmail_smtpd_exec_t</b> file type.</p> <p style="margin-left:11%; margin-top: 1em">The default entrypoint paths for the qmail_smtpd_t domain are the following:</p> <p style="margin-left:11%; margin-top: 1em">/var/qmail/bin/qmail-smtpd</p> <h2>PROCESS TYPES <a name="PROCESS TYPES"></a> </h2> <p style="margin-left:11%; margin-top: 1em">SELinux defines process types (domains) for each process running on the system</p> <p style="margin-left:11%; margin-top: 1em">You can see the context of a process using the <b>−Z</b> option to <b>ps</b></p> <p style="margin-left:11%; margin-top: 1em">Policy governs the access confined processes have to files. SELinux qmail_smtpd policy is very flexible allowing users to setup their qmail_smtpd processes in as secure a method as possible.</p> <p style="margin-left:11%; margin-top: 1em">The following process types are defined for qmail_smtpd:</p> <p style="margin-left:11%; margin-top: 1em"><b>qmail_smtpd_t</b></p> <p style="margin-left:11%; margin-top: 1em">Note: <b>semanage permissive -a qmail_smtpd_t</b> can be used to make the process type qmail_smtpd_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated.</p> <h2>BOOLEANS <a name="BOOLEANS"></a> </h2> <p style="margin-left:11%; margin-top: 1em">SELinux policy is customizable based on least access required. qmail_smtpd policy is extremely flexible and has several booleans that allow you to manipulate the policy and run qmail_smtpd with the tightest access possible.</p> <p style="margin-left:11%; margin-top: 1em">If you want to deny any process from ptracing or debugging any other processes, you must turn on the deny_ptrace boolean. Enabled by default.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P deny_ptrace 1</b></p> <p style="margin-left:11%; margin-top: 1em">If you want to allow all domains to use other domains file descriptors, you must turn on the domain_fd_use boolean. Enabled by default.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P domain_fd_use 1</b></p> <p style="margin-left:11%; margin-top: 1em">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.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P domain_kernel_load_modules 1</b></p> <p style="margin-left:11%; margin-top: 1em">If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P fips_mode 1</b></p> <p style="margin-left:11%; margin-top: 1em">If you want to enable reading of urandom for all domains, you must turn on the global_ssp boolean. Disabled by default.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P global_ssp 1</b></p> <p style="margin-left:11%; margin-top: 1em">If you want to allow confined applications to run with kerberos, you must turn on the kerberos_enabled boolean. Enabled by default.</p> <p style="margin-left:11%; margin-top: 1em"><b>setsebool -P kerberos_enabled 1</b></p> <h2>FILE CONTEXTS <a name="FILE CONTEXTS"></a> </h2> <p style="margin-left:11%; margin-top: 1em">SELinux requires files to have an extended attribute to define the file type.</p> <p style="margin-left:11%; margin-top: 1em">You can see the context of a file using the <b>−Z</b> option to <b>ls</b></p> <p style="margin-left:11%; margin-top: 1em">Policy governs the access confined processes have to these files. SELinux qmail_smtpd policy is very flexible allowing users to setup their qmail_smtpd processes in as secure a method as possible.</p> <p style="margin-left:11%; margin-top: 1em"><i>The following file types are defined for qmail_smtpd:</i></p> <p style="margin-left:11%; margin-top: 1em"><b>qmail_smtpd_exec_t</b></p> <p style="margin-left:11%; margin-top: 1em">- Set files with the qmail_smtpd_exec_t type, if you want to transition an executable to the qmail_smtpd_t domain.</p> <p style="margin-left:11%; margin-top: 1em">Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the <b>semanage fcontext</b> command. This will modify the SELinux labeling database. You will need to use <b>restorecon</b> to apply the labels.</p> <h2>COMMANDS <a name="COMMANDS"></a> </h2> <p style="margin-left:11%; margin-top: 1em"><b>semanage fcontext</b> can also be used to manipulate default file context mappings.</p> <p style="margin-left:11%; margin-top: 1em"><b>semanage permissive</b> can also be used to manipulate whether or not a process type is permissive.</p> <p style="margin-left:11%; margin-top: 1em"><b>semanage module</b> can also be used to enable/disable/install/remove policy modules.</p> <p style="margin-left:11%; margin-top: 1em"><b>semanage boolean</b> can also be used to manipulate the booleans</p> <p style="margin-left:11%; margin-top: 1em"><b>system-config-selinux</b> is a GUI tool available to customize SELinux policy settings.</p> <h2>AUTHOR <a name="AUTHOR"></a> </h2> <p style="margin-left:11%; margin-top: 1em">This manual page was auto-generated using <b>sepolicy manpage .</b></p> <h2>SEE ALSO <a name="SEE ALSO"></a> </h2> <p style="margin-left:11%; margin-top: 1em">selinux(8), qmail_smtpd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8) , setsebool(8)</p> <hr> </body> </html>