Guides & insights
Proxy & networking
Understand the ACME protocol: the role of the ACME server (Let's Encrypt, ZeroSSL, step-ca), the http-01 (/.well-known/acme-challenge), dns-01 and tls-alp…
Cloud computing
Design networking on Google Cloud: global VPC and regional subnets, firewall rules based on tags and service accounts, Cloud NAT, private access to Google…
Cloud computing
Design networking on Azure: virtual networks and subnets, network security groups (NSG), peering and hub-and-spoke topology, Azure Firewall, Private Endpo…
Systems & Linux
Configure and troubleshoot Linux networking: ip, ss, netplan and NetworkManager, DNS, layered diagnosis with ping, dig, curl, tcpdump, nftables, ufw and f…
Observability
Make a Kubernetes cluster's network flows visible with Cilium Hubble: architecture, the hubble observe CLI, graphical interface, Prometheus metrics and di…
Proxy & networking
Discover in depth how HAProxy integrates with Kubernetes: direct-to-pod architecture, hot update options (DNS, Consul), comparison with NGINX/Traefik, Gat…
Systems & Linux
Kubernetes Services explained: the role of a Kubernetes service, the ClusterIP, NodePort, LoadBalancer and ExternalName types, selectors, endpoints and be…
Learning never stops
