When it comes to building your toolbox we all have a few select favorites. Many tools come and go but there are those that have stuck around for the long haul. The ones you install on new computers and the ones you keep on a thumb drive, for portability.
Below is a list from my toolbox, 7 free tools for Network Administrators.
Once called Ethereal, this application is handy for troubleshooting networks and applications. With the plethora of options available, you can filter by protocols, IP addresses, and more.
Additionally, it makes a great learning resource for understanding TCP/IP communications.
Because Wireshark is such a powerful tool, I recommend reading Laura Chappell’s Wireshark 101.
This application makes it easy to do maintenance tasks such as uploading firmware to network devices and downloading backups of configuration files from network devices. If you have a template configuration file you can also upload them using TFTPD32.
My #1 most-used tool. Whether it’s consoling, ssh, or telnetting into a switch this is the application I use. It’s lightweight and simple to use. I can log all of my output to a text file which I have written about previously. It also interfaces with SuperPutty if you like using tabs.