In this episode of Linux Server Admin with Fexingo, Lucas and Luna dive into TCP Wrappers — a classic host-based access control system for Linux servers. They explain how TCP Wrappers work with the libwrap library, how to configure /etc/hosts.allow and /etc/hosts.deny to permit or deny connections by IP address or hostname, and the security implications for services like SSH and vsftpd. Lucas shares a real-world scenario from a university server environment where TCP Wrappers prevented an automated scanning attack. The hosts compare TCP Wrappers to modern alternatives like nftables and SELinux, and discuss why it's still relevant for legacy systems and simple perimeter control. Listeners will walk away understanding how to implement a fast, lightweight access control layer on their Linux servers today.

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