networking
Everything tagged "networking".
Network Services Handbook notes 3 min 24 Jul 2026 Port numbers suggest what may be running, but the banner and protocol response decide what the service actually is. LLMNR Poisoning and NTLM Relay notes 3 min 01 Aug 2026 When a Windows host cannot resolve a name over DNS, it falls back to broadcast name resolution (LLMNR, NBT-NS, mDNS) and asks the whole local segment "who is X?". Homelab v1.3 – The Silent Killers: DNS, Firewalls, and the Unbound Crash journal 5 min 09 Jan 2025 Four hours of debugging silent failures. A crashed DNS resolver, a CNI power struggle between Flannel and Cilium, an IPAM overlap that hijacked my LAN, and a hairpin loop I "fixed" by building a BGP highway before I realized I was fixing the wrong thing. Homelab v1.1 – The Great Wall of Fire: pfSense & Network Isolation journal 3 min 31 Dec 2024 Isolating the lab network from the home network with pfSense. Default-deny rules, aliases, and the anti-lockout trap that stumped me until I remembered DNS lives on the gateway.
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