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Switching Articles:
Cisco Switches
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Being able to monitor your network traffic is essential when it comes to troubleshooting problems, performing a security audit or even casually check…
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This article provides in-depth analysis of DHCP Option 82 (DHCP Relay Agent) which is one of the +180 DHCP Options available to the DHCP protocol and…
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Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch. When a port is error disabled, it is effectively shut dow…
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Cisco Wireless:
Cisco Wireless
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Cisco Aironet Access Points, just like most Cisco devices, provide a web interface from which we are able to configure the device. It is often we are…
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Cisco Wireless Controllers (WLC) support the configuration of Link Aggregation (IEEE 802.3ad - LAG) which bundles the controller ports into a single…
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The Firewall.cx Wireless LAN Key Generator will allow the generation of a WEP or WPA ASCII based encryption key and will provide the equivalent HE…
Cisco Firewalls:
Cisco Firewalls
Understand & Configure NAT Reflection, NAT Loopba…
This article examines the concept of NAT Reflection, also known as NAT Loopback or Hairpinning, and shows how to configure a Cisco ASA Firewall runni…
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In late 2014, Cisco announced the new licensing model for the latest AnyConnect Secure Mobility client v4.x. With this new version, Cisco introduced…
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Cisco’s Adaptive Security Appliance (ASA) Firewalls are one of the most popular and proven security solutions in the industry. Since the introduction…
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Wi-Fi Key Generator
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Cisco Password Crack
Decrypt Cisco Type-7 Passwords on the fly!
Cisco Routers
Cisco Router Modes
One of the greatest perhaps features of Cisco routers is that most commands used in the IOS software they run on, are identical across multiple platforms…
Cisco Routers
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MPLS generates Implicit Null label (The Implicit NULL label is the label that has a value of 3) for directly connected interfaces and for the summary rout…
Cisco Routers
Configuring Cisco Site to Site IPSec VPN with Dynamic…
This article serves as an extension to our popular Cisco VPN topics covered here on Firewall.cx. While we’ve covered Site to Site IPSec VPN Tunnel Between…
Cisco Routers
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For years now, Cisco has been developing its Security Device Manager (SDM) software. This web-based software is designed to help the less experienced user…
Cisco Data Center (Nexus/UCS)
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Cisco Data Center (Nexus/UCS)
Nexus 7000/7700 Software Upgrade via ISSU. Complete Up…
This article shows how to perform an ISSU (In-Service Software Upgrade) on a Nexus Data Center switch (7000 and 7700 models) and avoid service and network…
Cisco Data Center (Nexus/UCS)
NEXUS NX-OS: Useful Commands, CLI Scripting, Hints & T…
Whether you’re new to Cisco Nexus switches or have been working with them for years this article will show how to get around the Nexus NX-OS using sm…
Cisco Data Center (Nexus/UCS)
Complete Guide to Nexus Checkpoint & Rollback Feature…
The Cisco NX-OS checkpoint feature provides the capability to capture at any time a snapshot (backup) of the Cisco Nexus configuration befo…







