Author: Subnetica
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MTU vs MSS Explained: Why VPNs and Tunnels Break Large Packets
Diagnose small-packet success and large-packet failure with MTU, TCP MSS, encapsulation overhead, fragmentation, and Path MTU Discovery.
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FRRouting and the Linux Routing Table: How Routes Reach the Kernel
How FRRouting protocol daemons, Zebra, and the Linux kernel cooperate, and how to troubleshoot a route that exists in FRR but not in forwarding.
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5 Common Subnetting Mistakes That Break Real Networks
Five subnetting errors that cause asymmetric reachability, overlapping routes, bad gateways, and partial connectivity, with practical diagnostics.
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Linux Network Namespaces Explained: Build a Virtual Network on One Host
Use namespaces, veth pairs, bridges, and Linux routing to model hosts and routers on a single machine.