Configuring Policy-Based Routing on Linux for Multi-Homed Networks
Introduction to Policy Routing
In environments with multiple network interfaces (NICs) and public IP addresses, standard routing often fails to handle outgoing traffic correctly. By default, the Linux kernel routes traffic based solely on the destination address, which can cause packets sent from a secondary interface to be routed through the d ...
Posted on Sat, 08 Aug 2026 16:52:43 +0000 by labmixz
Configuring Network Settings in Linux
IP Address ClassificationIPv4 addresses are categorized into five classes (A through E), although D (multicast) and E (experimental) are rarely configured on standard hosts.Class A: The first octet represents the network (1-127). The loopback address consumes 127.0.0.0/8, leaving 126 valid networks. Each network supports 2^24 - 2 hosts. Default ...
Posted on Sun, 26 Jul 2026 16:16:19 +0000 by George Botley