Securing BIND 9 with SELinux (RHEL)

Presented by

Carsten Strotmann

About this talk

SELinux is an important security technology. While it can be used in every Linux system, the SELinux security policy is in practice only useable in Red Hat based systems (RedHat EL, CentOS, Fedora, AlmaLinux …). Carsten Strotmann explains the SELinux technology: - SELinux secures a BIND 9 DNS server - How the Red Hat- supplied SELinux policies for BIND 9 work - How users can adapt the SELinux Policy for BIND 9 - How to troubleshoot BIND 9 installations with SELinux This is the first of a series of 4 webinars on BIND 9 application security. Slides used are posted at --- Learn more at

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Internet Systems Consortium is a non-profit corporation dedicated to developing software and offering services in support of the Internet infrastructure. ISC develops and distributes three open source Internet networking software packages: BIND 9, ISC DHCP, and Kea DHCP. BIND 9, ISC’s Domain Name System (DNS) software program, is widely used on the Internet by enterprises and service providers, offering a robust and stable platform on top of which organizations can build distributed computing systems. ISC DHCP and Kea implement the Dynamic Host Configuration Protocol for connection to an IP network. Kea DHCP is ISC newer DHCP software, and is designed for modular extension, dynamic reconfiguration, and high performance. In addition to our open source software, ISC also operates critical Internet infrastructure in the form of the F-Root server, one of the 13 Internet root name servers that power the global Internet. ISC is supported through the sale of annual support subscriptions for our open source software. These support services also include advance notification of security vulnerabilities, and in some cases, non-public software extensions. For more information please visit or email us at