Configuring site to site VPN tunnels securely starts with strong cryptography, accurate traffic selectors, reliable routing, and careful testing. In 2026, IKEv2 is the preferred starting point for new IPsec tunnels, while IKEv1 is mainly kept for legacy compatibility. NIST…
Types VPN protocols comparison IPsec SSL TLS starts with the main distinction: IPsec protects IP traffic at the network layer. While TLS-based VPNs commonly handle remote-user or application traffic. WireGuard and OpenVPN use different tunnel designs, so the right fit…
VPN technologies and security concerns go beyond encryption. A secure VPN also needs strong authentication, endpoint controls, network segmentation, monitoring, and timely patching. Verizon’s 2025 DBIR found that edge devices and VPNs accounted for 22% of targets in vulnerability-exploitation incidents,…
Router switch activity is easier to track when logs, metrics, traffic flows, and synced timestamps are reviewed together. Syslog uses severity levels from 0 to 7, while IPFIX helps move flow data between exporters and collectors. But these sources serve…
Regular firmware updates router switch vulnerabilities matter because patches fix known flaws before attackers can use them. Routers and switches can expose network traffic when old firmware has security gaps. One recent case, CVE-2026-71992, shows the risk. The flaw allows…
Infrastructure ACL configuration guidelines filtering controls which traffic can reach routers, switches, and other network devices. An infrastructure access control list, or iACL, blocks unwanted traffic before it reaches device addresses. But rules must allow required traffic, or outages can…
Securing routing protocols OSPF BGP authentication helps block unauthorized peers and false route updates. OSPF and BGP need different controls, so the setup can’t be identical. Use authentication between trusted OSPF neighbors. For BGP, secure sessions and apply prefix filters…
DHCP snooping configuration benefits security by validating DHCP traffic, blocking unauthorized server responses, and creating IP-MAC-port bindings for stronger Layer 2 protection. In production, the setup depends on clear trust boundaries, accurate bindings, suitable rate limits, and careful testing. Network…
Preventing ARP spoofing dynamic ARP inspection starts by checking ARP traffic against trusted IP-MAC bindings before forged mappings can reach other devices. DAI works best when it is supported by DHCP snooping, which provides the binding data the switch uses…
Configuring control plane policing CoPP routers helps protect the route processor from excessive CPU-bound traffic while keeping routing and management services available. We recommend starting with a permissive policy so you can see which traffic matches before applying strict limits. …