27 articles tagged with Networking.
\"It's always DNS\" is a joke because the failure modes are so scattered: resolver config, caching, search domains, split DNS. Here is where to actually look.
iptables still works, but nftables is what every modern distro ships by default now. Here is how the two actually differ and how to migrate a real ruleset.
A developer-friendly walk through DNS resolution, record types, TTL, and the caching quirks that cause real production bugs.
A practical tour of the core load balancing algorithms, how each distributes traffic, and when to reach for one over another.
A developer-focused walkthrough of the TLS 1.3 handshake, certificate trust, forward secrecy, and how to debug the errors you actually hit.
A practical, step-by-step guide to putting Nginx in front of your app for TLS, routing, and load balancing.
You don't need a CCNA to ship reliable services, but you do need the core ideas. This is the map: DNS, TCP, TLS, proxies, and CDNs, minus the jargon.
A practical look at how TCP and UDP trade reliability for speed, and how to pick the right one for your service.
A plain-English guide to content delivery networks, the edge servers behind them, and how caching cuts latency for users everywhere.
Track down what owns a busy port, decide whether to kill it or rebind, and stop TIME_WAIT from blocking your restart.
A pod can't reach a service by name, the app throws connection errors, and everyone blames the network. Usually it's DNS, and usually it's fixable.
A 502 from your ingress means no healthy backend to talk to. A 504 means the backend answered too slowly. Here's how to tell them apart and fix each.
