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Cisco Firewalls
Cisco’s Adaptive Security Appliance (ASA) Firewalls are one of the most popular and proven security solutions in the industry. Since the introduction…
Cisco Routers
GRE Tunnels are very common amongst VPN implementations thanks to their simplicity and ease of configuration. With broadcasting and multicasting supp…
Cisco Switches
This article shows how to reset a password on a Cisco Catalyst 3750-X (stacked or single unit) and Cisco Catalyst 3560-x switch without losing its st…
Cisco Data Center (Nexus/UCS)
It’s a reality – Australia now has its own Official Cisco Data Center User Group (DCUG) and it’s growing fast! Originally inspired by Cisco Champions…

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Data Center Articles:

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 ne…
Cisco virtual Port Channel (vPC) is a virtualization technology, launched in 2009, which allows links that are physically connected to two different…
The Cisco NX-OS checkpoint feature provides the capability to capture at any time a snapshot (backup) of the Cisco Nexus configuration…
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 usi…

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Cisco Switches
Many companies are seeking for Cisco SFP alternatives to help cut down the costs on these expensive modules. A frequent customer problem with Cisco's new…
Cisco Switches
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 used…
Cisco Switches
It's no news that we here at Firewall.cx enjoy writing about our installations of Cisco equipment and especially devices that we don’t get to see and play…
Cisco Switches
Errdisable is a feature that automatically disables a port on a Cisco Catalyst switch. When a port is error disabled, it is effectively shut down and…

Cisco Firewalls
Cisco’s Adaptive Security Appliance (ASA) Firewalls are one of the most popular and proven security solutions in the industry. Since the introduction of t…
Cisco Firewalls
This article examines the concept of NAT Reflection, also known as NAT Loopback or Hairpinning, and shows how to configure a Cisco ASA Firewall running AS…
Cisco Firewalls
This article will show how to download and upload the newer AnyConnect 4.x VPN clients to your Cisco ASA Firewall appliance (5500 & 5500-X Series) and…
Cisco Firewalls
The Cisco ASA 5500 series security appliances have been around for quite some time and are amongst the most popular hardware firewalls available in the ma…

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Palo Alto Networks
What makes Palo Alto Networks Next-Generation Firewall (NGFW) so different from its competitors is its Platform, Process and Architecture. Palo Alto Netwo…
Palo Alto Networks
This article provides comprehensive guidance on the manual processes involved in downloading, uploading, and installing (import) any PAN-OS version on a P…
SASE & SD-WAN Networks
Software Defined Wide Area Networking (SD-WAN) is changing the way that businesses connect to the cloud. With SD-WAN, organizations can move away from clo…
SASE & SD-WAN Networks
The Virtual Private Network (VPN) has become the go to security solution for keeping communications between networks and endpoints secure. After all, VPNs…