Systems & Linux
Active Directory Domain Services and DNS
Understand and deploy Active Directory: forest, domains, organizational units, domain controllers, FSMO roles, sites and replication, integrated DNS, acco…
Guides & insights
A library for curious minds
Systems & Linux
Windows networking: IP, DNS, DHCP, firewall and remote access
Configure and troubleshoot Windows networking with PowerShell, deploy a DHCP server, master Windows Firewall and its profiles, and administer remotely wit…
Proxy & networking
The ACME protocol: ACME server, http-01 and dns-01 challenges, TLS automation
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
Google Cloud networking: global VPC, subnets, firewall and load balancing
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
Azure networking: VNet, NSG, peering, load balancing and hybrid connectivity
Design networking on Azure: virtual networks and subnets, network security groups (NSG), peering and hub-and-spoke topology, Azure Firewall, Private Endpo…
Systems & Linux
Networking on Linux: configuration, diagnosis, firewall and SSH
Configure and troubleshoot Linux networking: ip, ss, netplan and NetworkManager, DNS, layered diagnosis with ping, dig, curl, tcpdump, nftables, ufw and f…
Observability
Observing the Kubernetes network with Cilium Hubble
Make a Kubernetes cluster's network flows visible with Cilium Hubble: architecture, the hubble observe CLI, graphical interface, Prometheus metrics and di…
Proxy & networking
HAProxy in Kubernetes: the high-performance Ingress Controller
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: ClusterIP, NodePort, LoadBalancer and ExternalName
Kubernetes Services explained: the role of a Kubernetes service, the ClusterIP, NodePort, LoadBalancer and ExternalName types, selectors, endpoints and be…
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