NetBay journal

Linux Networking

18 practical Linux Networking articles from Netbay Engineering — written for operators running Linux and Windows VPS in India.

18 articles in this topic

Replace slow linear iptables rules with high-performance nftables interval sets, verdict maps, and connection tracking on production Linux.

Eliminate latency spikes and packet buffering bottlenecks under high load by deploying CAKE queue discipline via Linux tc.

Filter millions of packets per second before network stack allocation using eBPF eXpress Data Path (XDP) programs on modern Linux.

Configure multiple default gateways, source-based routing rules, and isolated routing tables using iproute2 on multi-homed Linux VPS.

Enable IPv6 correctly on your Linux VPS with dual-stack addressing, default routes, and firewall rules for both protocol families.

Understand DHCP client behavior on Linux servers, why addresses change unexpectedly, and when static config is the safer choice.

Understand how Linux resolves hostnames through systemd-resolved, resolv.conf, and the hosts file, and fix DNS problems.

Tune MTU and TCP stack parameters through net.core and net.ipv4 sysctl knobs to improve throughput and reduce latency on Linux.

Use ss to inspect sockets and connections and ethtool to read NIC statistics for diagnosing Linux server networking problems.

Use ping, traceroute, and mtr to diagnose network latency and packet loss on a Linux VPS, and interpret the results correctly.

Capture and analyze network traffic with tcpdump to debug slow connections, DNS issues, and firewall problems like a detective.

Understand the transition from iptables to nftables and write clean, maintainable firewall rules for your Linux VPS.