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In our tech blog, we share technical insights, tutorials, and best practices from our daily work. Here you will find articles about topics such as Proxmox, Kubernetes, open-source infrastructure, system administration, and modern IT platforms.

  • grommunio Official Partner

    Install grommunio 2026.06.1

    32 minutes read

    Complete step-by-step guide from the KVM lab: install the appliance, run setup, verify organization, domain, user, mailbox, alias, DNS, TLS and mailflow.

    : Install grommunio 2026.06.1
  • freeipa logo

    FreeIPA Enterprise Architecture

    18 minutes read

    How to separate FreeIPA, DNS, PKI, HBAC, sudo, Keycloak and automation cleanly in larger Linux environments.

    : FreeIPA Enterprise Architecture
  • freeipa logo

    Installing FreeIPA

    24 minutes read

    Step by step from an empty Linux server to a working FreeIPA lab with Kerberos, Web UI, first user, group and enrolled client.

    : Installing FreeIPA
  • Abstract Kubernetes cluster topology with security review and policy layers

    Kubernetes Security Audit in Practice: Reviewing RBAC, Pod Security, NetworkPolicies and CIS

    11 minutes read

    Defensive Kubernetes security audit covering RBAC, ServiceAccounts, Pod Security, NetworkPolicies, Secrets, images, CIS, remediation and verification.

    : Kubernetes Security Audit in Practice: Reviewing RBAC, Pod Security, NetworkPolicies and CIS
  • Ansible Logo

    Install Ansible and create your first playbooks

    12 minutes read

    From installation through inventory and playbooks to a reusable Chrony role.

    : Install Ansible and create your first playbooks
  • Abstract decision matrix for security assessment, vulnerability scan and penetration testing

    Professional penetration testing for open-source and Kubernetes environments

    8 minutes read

    Differences between vulnerability scan, configuration review, security assessment and penetration test for modern open-source and Kubernetes platforms.

    : Professional penetration testing for open-source and Kubernetes environments