Cisco SD-WAN revolutionizes network management by decoupling the control and management planes from WAN edge routers, centralizing them in software-based controllers. This architectural shift improves security, availability, and scalability, making Cisco SD-WAN a preferred choice for managing large and distributed networks. In this blog post, we’ll explore the roles of vEdge routers and the SD-WAN controllers, namely vSmart, vManage, and vBond, each of which interacts with WAN edge devices in unique ways to ensure secure, streamlined, and reliable control connections. Control Connections and Security Protocols Each vEdge router establishes secure control connections to SD-WAN controllers using DTLS or TLS protocols. DTLS, which operates over UDP, is the default protocol due to its efficiency and speed, while TLS, running over TCP, provides slightly enhanced reliability. These protocols create secured tunnels that shield the control plane protocols (such as OMP, NETCONF, and SNMP) from
How to Detect ARP Poisoning with Wireshark: A Step-by-Step Guide In a world where cybersecurity is of utmost importance, network administrators need the right tools to ensure their networks are protected from malicious threats. One such threat is ARP poisoning , a method used by hackers to intercept or reroute traffic by sending falsified ARP messages. Wireshark, a popular network analysis tool, provides a powerful way to monitor and analyze traffic. In this post, we'll walk you through how to use Wireshark to detect ARP poisoning on a small corporate network. Why ARP Poisoning is a Major Threat ARP poisoning compromises network integrity, allowing attackers to intercept or modify data. It can be used to execute man-in-the-middle attacks, compromising sensitive information, redirecting traffic, or disrupting communication between devices. Using Wireshark to Detect ARP Poisoning Capturing Packets: Start by capturing packets on the enp2s0 interface for five seconds using Wireshar