About 146 results
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Secure your router with Cisco's SDM Firewall Policy Wizard
Cisco's Security Device Manager (SDM) now boasts the Firewall Policy Wizard, which you can use to create a firewall. David Davis walks you through the process.
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Access the Cisco CLI with one of these five terminal emulators
The best way to manage the Cisco IOS is through a terminal emulator using the command-line interface (CLI). What's the best terminal emulator to use? David Davis asked TechRepublic...
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Get a better grasp of Cisco commands with the Output Interpreter
Have you ever entered a Cisco command and been completely overwhelmed by its output? Some commands can return dozens of pages of output, and it's easy to feel like it's in a foreig...
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Roll back changes on your Cisco router with this command
What happens if you've made changes to your router's configuration and something goes wrong? How can you get back to where you started? David Davis tells you about a command that h...
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Configure Cisco routers to use Active Directory authentication -- the router side
Did you know that you can leverage the Windows Active Directory username/password database to log in to your Cisco routers and switches? Last time, David Davis explained how to ins...
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Configure Cisco routers to use Active Directory authentication -- the Windows side
Did you know that you can leverage the Windows Active Directory username/password database to log in to your Cisco routers and switches? In this two-part series, David Davis walks ...
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What's the best Cisco router configuration and management tool?
It's rare to be able to accomplish everything you need using only the Cisco IOS; the reality is that additional tools are necessary. Because of the plethora of tools available, the...
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Cisco administration 101: What you need to know about default routes
Default routes tell routers and switches where to go to if they don't have a specified route in their routing table. David Davis reviews the basics of default routes, explains how ...
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Configure WCCP on your Cisco IOS router
What is the Web cache communications protocol (WCCP), and how can it help you? David Davis introduces you to WCCP, tells you about its advantages, and explains how to configure it ...
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Prevent outbound IP spoofing with the Cisco IOS
David Davis recently discussed how to prevent inbound IP spoofing, but outbound spoofing also poses a threat to your organization. Find out how to prevent outbound IP spoofing, and...
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Manage network broadcasts on Cisco switches using storm control
It's important to protect your organization's LAN from broadcast storms, which can cause network slowdowns if they become severe. David Davis explains how you can easily and quickl...
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Prevent IP spoofing with the Cisco IOS
In a typical IP address spoofing attempt, the attacker fakes the source of packets in order to appear as part of an internal network. David Davis tells you three ways you can make ...
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Automate changes to your Cisco router with Kiwi CatTools
David Davis is always open to learning about new tools that help simplify Cisco administration, so when TechRepublic members told him about Kiwi CatTools, he decided to take a look...
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Will an open source router replace your Cisco router?
How do Vyatta's open source routers stack up to Cisco? David Davis took one for a test drive to find out. Get the details on Vyatta's offerings, and get David's first impressions o...
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Prepare Cisco devices for Daylight Saving Time changes
Daylight Saving Time comes early this year: Are your Cisco devices ready for the change? David Davis tells you two ways to make sure your Cisco routers and switches reflect the cor...
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Buying the best switch: Linksys vs. Cisco
You may think of Linksys as the consumer-grade switch vendor, but the company boasts a line of Business Series switches as well. How do they stack up against Cisco switches? David ...
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Learn about changes to Cisco's CCNP certification
Cisco has made some substantial modifications to the exams required for its CCNP certification, and these changes took effect at the beginning of the year. Let David Davis walk you...
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Cisco administration 101: Learn the difference between PIX and ASA
While Cisco introduced the Adaptive Security Appliance (ASA) in 2005, its PIX firewall is still alive and kicking. Which one is best for your organization's needs? David Davis deta...
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Analyze traffic on switch ports with SPAN and RSPAN
While the ability to monitor your network traffic is critical, the process is different on a switch than on a router. In this edition of Cisco Routers and Switches, David Davis tel...
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Control unwanted traffic on your Cisco router with CAR
If you're sick of unnecessary traffic clogging up your network, you don't have to take it anymore. You can manage that unwanted traffic using committed access rate (CAR)—or "rate l...
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Configure a Cisco PIX Firewall with this template
Configuring a new Cisco PIX Firewall can be challenging and time-consuming. Why not automate the process with an Excel template? We've done most of the work for you by creating a d...
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Get better performance with Cisco Express Forwarding (CEF)
Cisco Express Forwarding (CEF) can result in faster switching and enable advanced features in the Cisco IOS. David Davis introduces you to CEF and its benefits in this article.
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Cisco administration 101: Configure GRE tunnels
Using generic routing encapsulation (GRE) tunnels on Cisco routers can come in handy with Cisco router administration, and configuring GRE tunnels is relatively easy. David Davis h...
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Configure a Cisco Catalyst 2950 switch with this template
While configuring a new Cisco Catalyst switch isn't necessarily difficult, it can be time-consuming. Why not automate the process with an Excel template? We've done most of the wor...
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How do I... Speed up the switch port initialization process?
When connecting a PC to a Cisco switch, it may sometimes take 30 seconds or more before the PC can communicate on the network. But with a few simple steps, you can shave off 30 sec...
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Configure QoS on your Cisco router with this template
Using quality of service (QoS) on Cisco network devices helps provide both bandwidth and priority to certain types of network traffic. In this edition of Cisco Routers and Switches...
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Learn the benefits of Cisco AutoQoS
Configuring quality of service (QoS) can be very complex. To help make network administrators' lives easier, Cisco has developed AutoQoS, which configures QoS settings for you. In ...
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How do I... Monitor traffic on a network for free with Ethereal
If you want to monitor traffic on your network, you can purchase a packet analyzer. However if your budget is tight, you don't have to spend any money at all. Here's how you can do...
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Cisco administration 101: What you need to know about OSPF
The Open Shortest Path First (OSPF) protocol is one of the most popular internal routing protocols used by midsize and large companies. Not very familiar with this protocol? David ...
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Properly set a Cisco router's clock and time zone
Does setting the correct time on a router really matter? Actually, it does. In this edition of Cisco Routers and Switches, David Davis reviews the benefits of setting the correct t...