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Windows Servers
DNS is used for translating host names to IP addresses and the reverse, for both private and public networks (i.e.: the Internet). DNS does this by using records stored in its database. On the Intern…
Cisco Switches
This article covers popular Layer 2 & Layer 3 network attacks with a focus on DHCP Starvation Attacks, Man-in-the-Middle attacks, unintentional rogue DHCP servers and explains how security featur…
Network Address Translation - NAT
Dynamic NAT is the second NAT mode we're going to talk about. Dynamic NAT, like Static NAT, is not that common in smaller networks but you'll find it used within larger corporations with complex netw…
Cisco CallManager-CCME
Firewall.cx readers can now access and freely download the Cisco Small Business Administration Guide for Cisco SPA500 series IP phones.  The Administration Guide for Cisco SPA500 series IP phon…
OpManager - Network Monitoring & Management
Learn how IT Experts and Managers take on their organization’s challenges while working remotely. How do you continue your IT Operation Management Strategy while at the same time ensuring Network Com…
Network Fundamentals
The term "Broadcast" is used very frequently in the networking world . You will see it in most networking books and articles, or see it happening on your hub/switch when all the LED's start flashing…
Routing
Distance Vector, Link State RIP, IGRP, EIGRP, OSPF Routing protocols were created for routers. These protocols have been designed to allow the exchange of routing tables, or known networks, betwee…
Cisco Data Center (Nexus/UCS)
The Cisco NX-OS checkpoint feature provides the capability to capture at any time a snapshot (backup) of the Cisco Nexus configuration before making any changes. The captured configura…
Network Protocol Analyzers
ARP attacks and ARP flooding are common problems small and large networks are faced with. ARP attacks target specific hosts by using their MAC address and responding on their behalf, while at the sam…
Cisco Routers
Site-to-Site IPSec VPN Tunnels are used to allow the secure transmission of data, voice and video between two sites (e.g offices or branches). The VPN tunnel is created over the Internet public netwo…
SASE & SD-WAN Networks
Secure Access Service Edge (SASE) is an architecture widely regarded as the future of enterprise networking and security. In previous articles we talked about the benefits of a converged, cloud-deliv…
Virtualization & VM Backup
Businesses that rely on virtual machines for their day-to-day operations should think twice about securing their infrastructure. Modern use of virtual machines stems from the benefits of virtualizati…

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