Frequently Asked Questions About Linux / UNIX » SELinux http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Tue, 21 May 2013 21:38:37 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 What Is SELinux?http://www.cyberciti.biz/faq/what-is-selinux/ http://www.cyberciti.biz/faq/what-is-selinux/#comments Thu, 06 Dec 2012 17:08:37 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12977 What is SELinux? Why should I use SELInux on my CentOS or Red Hat Enterprise Linux server running on IBM hardware?

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]]> http://www.cyberciti.biz/faq/what-is-selinux/feed/ 1 seinfo Command: Query SELinux Policy Under CentOS / RHEL / Linuxhttp://www.cyberciti.biz/faq/howto-query-components-of-selinux-policy/ http://www.cyberciti.biz/faq/howto-query-components-of-selinux-policy/#comments Sat, 01 Dec 2012 23:15:21 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12993 How do I query and get information about a policy under SELinux? How do I analyze a binary or a source policy file under SELinux?

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]]> http://www.cyberciti.biz/faq/howto-query-components-of-selinux-policy/feed/ 0 tar and rsync: Archive and Preserve SELinux Contexts, Extended Attributes, And ACLshttp://www.cyberciti.biz/faq/linux-tar-rsync-preserving-acls-selinux-contexts/ http://www.cyberciti.biz/faq/linux-tar-rsync-preserving-acls-selinux-contexts/#comments Fri, 09 Nov 2012 22:11:25 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12906 How do I use tar and rsync command that can preserve the ACLs, extended attributes and SELinux contexts under CentOS / RHEL / Fedora Linux server while making backups?

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]]> http://www.cyberciti.biz/faq/linux-tar-rsync-preserving-acls-selinux-contexts/feed/ 0 HowTo: Temporarily Switch Off SELinux Enforcementhttp://www.cyberciti.biz/faq/rhel-fedora-centos-linux-temporarily-switchoff-selinux/ http://www.cyberciti.biz/faq/rhel-fedora-centos-linux-temporarily-switchoff-selinux/#comments Sun, 08 Apr 2012 19:39:44 +0000 nixCraft /selinux/enforce]]> /selinux/enforce]]> http://www.cyberciti.biz/faq/?p=11829 How do I temporarily switch off SELinux enforcement under Red Hat Enterprise Linux server version 6.x using command prompt? How do I turn on SELinux enforcement again?

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]]> http://www.cyberciti.biz/faq/rhel-fedora-centos-linux-temporarily-switchoff-selinux/feed/ 0 Linux Syslogd: Nothing Gets Logged Using /dev/log And /jail/apache/dev/loghttp://www.cyberciti.biz/faq/syslog-fails-to-open-devlog-nothing-gets-logged/ http://www.cyberciti.biz/faq/syslog-fails-to-open-devlog-nothing-gets-logged/#comments Sun, 22 Aug 2010 07:33:19 +0000 nixCraft http://www.cyberciti.biz/faq/?p=8636 I've configured my Apache in chrooted jail at /jail/apache directory. However, my syslogd is not working and nothing gets logged using /dev/log and /jail/apache/dev/log. How do I fix this problem under CentOS 5.x AMD64 with SELinux?

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]]> http://www.cyberciti.biz/faq/syslog-fails-to-open-devlog-nothing-gets-logged/feed/ 0 CentOS / Redhat: Turn On SELinux Protectionhttp://www.cyberciti.biz/faq/rhel-fedora-redhat-selinux-protection/ http://www.cyberciti.biz/faq/rhel-fedora-redhat-selinux-protection/#comments Tue, 05 Jan 2010 11:52:59 +0000 nixCraft http://www.cyberciti.biz/faq/?p=6166 SELinux enforces the idea that programs should be limited in what files they can access and what actions they can take. However, by default it is turned off under RHEL / CentOS 5.x server? How do I turn it on?

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]]> http://www.cyberciti.biz/faq/rhel-fedora-redhat-selinux-protection/feed/ 4 Linux Kernel /etc/sysctl.conf Security Hardeninghttp://www.cyberciti.biz/faq/linux-kernel-etcsysctl-conf-security-hardening/ http://www.cyberciti.biz/faq/linux-kernel-etcsysctl-conf-security-hardening/#comments Tue, 27 Oct 2009 16:55:00 +0000 nixCraft http://www.cyberciti.biz/faq/?p=5564 How do I set advanced security options of the TCP/IP stack and virtual memory to improve security and performance of my system? How do I configure Linux kernel to prevent certain kinds of attacks using /etc/sysctl.conf? How do I set Linux kernel parameters?

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]]> http://www.cyberciti.biz/faq/linux-kernel-etcsysctl-conf-security-hardening/feed/ 3 Redhat / CentOS Install Memcached Caching Systemhttp://www.cyberciti.biz/faq/rhel-fedora-linux-install-memcached-caching-system-rpm/ http://www.cyberciti.biz/faq/rhel-fedora-linux-install-memcached-caching-system-rpm/#comments Mon, 19 Oct 2009 03:02:43 +0000 nixCraft http://www.cyberciti.biz/faq/?p=5382 How do I install memcached a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load under CentOS / RHEL / Fedora / Redhat Linux?

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]]> http://www.cyberciti.biz/faq/rhel-fedora-linux-install-memcached-caching-system-rpm/feed/ 9 Squid Listen on Other Port ( Squid Configure Port Listing with SELinux)http://www.cyberciti.biz/faq/linux-unix-squid-listen-on-other-port/ http://www.cyberciti.biz/faq/linux-unix-squid-listen-on-other-port/#comments Mon, 20 Apr 2009 12:26:32 +0000 nixCraft http://www.cyberciti.biz/faq/?p=3646 My Squid proxy server running on port 3128. Since this is frequently scanned by adversaries looking for proxy servers; I've changed port to 10000 and restart squid. But my squid is not working on port # 10000 it only works on port # 3128? How do I force Squid to listen on uncommon port under CentOS Linux v5.3?

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]]> http://www.cyberciti.biz/faq/linux-unix-squid-listen-on-other-port/feed/ 5 SELinux Apache Allow To Serve The Contents Of a Loopback Mounted ISO Imagehttp://www.cyberciti.biz/faq/selinux-permit-apache-serve-contents-of-loopback-iso/ http://www.cyberciti.biz/faq/selinux-permit-apache-serve-contents-of-loopback-iso/#comments Wed, 31 Dec 2008 18:11:57 +0000 nixCraft http://www.cyberciti.biz/faq/?p=3002 Q. How do I configure CentOS Linux SELinux security to permit httpd 2.2 (Apache web server) to serve the contents of a loopback mounted ISO images located at /var/www/html/lan/iso directory?

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]]> http://www.cyberciti.biz/faq/selinux-permit-apache-serve-contents-of-loopback-iso/feed/ 0 Linux Disable or Enable ExecShield Buffer Overflows Protectionhttp://www.cyberciti.biz/faq/what-is-rhel-centos-fedora-core-execshield/ http://www.cyberciti.biz/faq/what-is-rhel-centos-fedora-core-execshield/#comments Mon, 09 Apr 2007 12:25:25 +0000 nixCraft http://www.cyberciti.biz/faq/linux-disable-or-enable-execshield-protection/ Now that I have Cent OS (RHEL clone) installed on my IBM server, I'm wondering what is ExecShield and how do I disable the same?

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]]> http://www.cyberciti.biz/faq/what-is-rhel-centos-fedora-core-execshield/feed/ 3 CentOS Linux Install OpenVZ Virtualization Softwarehttp://www.cyberciti.biz/faq/rhel-redhat-centos-setup-openvz-virtualization/ http://www.cyberciti.biz/faq/rhel-redhat-centos-setup-openvz-virtualization/#comments Sat, 05 Aug 2006 18:39:39 +0000 nixCraft http://www.cyberciti.biz/faq/?p=4600 How do I install OpenVZ Virtualization container software under Red Hat Enterprise Linux or CentOS Linux 5.x server?

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