Monthly Archives: October 2012

Blocking Hackers From Accessing Your Switch via Telnet/SSH

It’s amazing how much rattling at the doors and attempted intrusions companies become accustomed to seeing on their networks. Here I show a simple way to block telnet/SSH access to your switch. First, you should never use telnet to manage … Continue reading

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Trunking and DHCP Across Dell Force10 Switches

I did this lab some time back and thought it would be useful to post. In this lab I use a Dell Force10 S25P (FTOS 8.4.2.6) switch and Dell Force10 S50N (FTOS 8.4.2.6) switch to demonstrate trunking and Dynamic Host … Continue reading

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Gratuitous ARP and Basics of Connecting a Cisco IOS Switch with a Cisco CatOS Switch

Some of you may have an old Cisco Catalyst switch laying around that you may want to put to use. CatOS is the old Cisco operating system for Catalyst switches that predates IOS; it can still be found on some … Continue reading

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