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OpenVPN is one of the most trusted and widely deployed open-source VPN solutions, providing secure, encrypted network connectivity across untrusted networks...
SSH tunneling, also known as SSH port forwarding, is a powerful technique that leverages the secure SSH protocol to create encrypted tunnels for forwarding...
Network troubleshooting is a critical skill for system administrators, DevOps engineers, and IT professionals who manage servers and infrastructure. When...
iptables is the traditional and powerful packet filtering framework that has been the cornerstone of Linux firewall management for decades. As a user-space...
nftables represents the modern evolution of Linux packet filtering, designed as the successor to the venerable iptables, ip6tables, arptables, and ebtables...
tcpdump is the quintessential command-line packet analyzer for Unix-like systems, providing powerful capabilities for capturing, filtering, and analyzing...
Traffic Control (tc) is Linux's powerful framework for managing, shaping, and controlling network bandwidth at the kernel level. As part of the Linux...
Configuring a static IP address on Linux servers is a fundamental skill for system administrators and DevOps engineers. Unlike dynamic IP addresses assigned...
IPv6 (Internet Protocol version 6) represents the future of Internet addressing, designed to replace the aging IPv4 protocol. With the exhaustion of IPv4...
Reverse DNS (rDNS), also known as PTR (Pointer) records, is a critical DNS configuration that maps IP addresses back to domain names—the reverse of standard...
