How to Use Linux Server TCP Wrappers for Host-Based Access Control

Linux Server Admin with Fexingo: Sysadmin, Bash, and Server Engineering · Jul 2, 2026 · 11m · transcript

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…