50 Critical Linux Ports You Must Close to Secure Your System

This guide lists the most dangerous Linux ports, explains their typical uses, the security risks they pose, and provides concrete recommendations—such as changing default ports, disabling services, and applying firewall rules—to harden your system against attacks.

Information SecurityLinuxPort Security

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50 Critical Linux Ports You Must Close to Secure Your System

Cloud Native Technology Community

Jun 21, 2022 · Cloud Native

Understanding Kube-OVN Security Groups and Pod Port Security

This article explains how Kube-OVN implements security groups and port security for Kubernetes pods by leveraging OVN port groups, address sets, and ACLs, detailing the CRD design, annotation usage, and the workflow that synchronizes pod network interfaces with security policies.

CNIKube-OVNKubernetes

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Understanding Kube-OVN Security Groups and Pod Port Security

Ops Development Stories

Apr 22, 2019 · Information Security

How MAC Flooding and ARP Spoofing Attacks Work—and How to Defend Them

This article explains the MAC learning and aging processes, demonstrates MAC flooding and ARP spoofing attacks with practical test setups, and provides step‑by‑step configurations such as port security, access management, and DHCP snooping to protect network switches from these threats.

ARP spoofingAccess ManagementDHCP snooping

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How MAC Flooding and ARP Spoofing Attacks Work—and How to Defend Them