Networking & Infrastructure Hub

Welcome to the Networking & Infrastructure Hub. Use these guides to configure switching and routing, provide resilient network services, publish applications, and investigate connectivity problems.

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🗂️ Networking Knowledge Tracks

Switching and VLANs

Configure endpoint access ports and inter-switch trunks, then verify VLAN membership and trunk state.

Cisco IOS XE Access and Trunk VLAN Ports →

Routing and DHCP Relay

Route between VLAN interfaces and trace relayed DHCP requests to their server scopes.

Inter-VLAN Routing on Cisco IOS XE →
Troubleshoot DHCP Relay Across VLANs →

VPN & Overlay Networks

A host-to-host WireGuard tunnel and a Tailscale subnet router with explicit access grants.

Browse WireGuard Quickstart →
Browse Tailscale Subnet Router and Access Grants →

Reverse Proxies & Edge TLS

Caddy reverse proxy configuration, automatic HTTPS, and a Windows/Linux Jellyfin deployment.

Browse Proxy Guides →
Publish Jellyfin with Caddy on Windows or Linux →

DNS & DHCP Infrastructure

Pi-hole DNS filtering with an encrypted DNS-over-HTTPS upstream.

Browse DNS Guides →

Container & Virtual Networking

User-defined bridge network boundaries, an internal backend, Compose secrets, and optional Macvlan LAN addresses.

Browse Docker Network Isolation →

Packet Analysis

Inspect DNS and TCP behavior in packet captures to narrow down network faults.

Triage DNS and TCP with Wireshark →

Network Troubleshooting

Diagnose path MTU discovery failures that can stall VPN, TLS, and large transfers.

Triage Path MTU Problems →