David Davis goes over the Cisco IOS commands you must know to manipulate files on your Cisco router flash, nvram, or other filesystems, allowing you to back up your configuration, upgrade your router, ...

files incremental-diffs Display lines in config file which will be added to running-config As these archived configurations are just text files in the flash memory, you can copy them back to the ...

This month's article will introduce network router programming. If you have not worked with IT infrastructure, you may be surprised at the number of options and possible configurations available to ...

It's been years since I did anything hardcore like reprogramming routers. We've got a situation where we are using a router, it works fine, but we need to switch over to a new config with increased ...

Firmware is the software embedded in your router. Its firmware helps the router figure out how to carry on different tasks. To update it, you have to flash the updated software in the router. We’ll ...

Cybersecurity nowadays requires more (and better) protective measures than ever before. These measures range from adopting what are acknowledged as best practices, through helping end-users to stay ...

Previous articles (Part one, Part two) in this series on implementing VPN gateways using Cisco routers discussed the IPsec protocol and basic IPsec VPN connection models. Now we'll learn how to ...