Cisco VoIP Phones – A Hackers Perspective
Introduction In the world of VoIP phones, each person may look at them differently. For some, an annoyance that sit on their desk, or maybe for some it is simply a part of their job either deploying them or as a help desk position taking phone calls all day. This could even go as far […]
Script to backup Cisco switches via telnet / tftp
A couple of days ago, I have released a small perl script to back up Cisco IOS based switches via telnet. I know there are a couple of similar scripts available on the internet, but most of them either use the “expect” functionality (which does not work all the time), or use SendKeys (which only […]
Juniper ScreenOS : defeating iBGP full mesh requirement using route reflectors and confederations
As explained in one of my earlier posts, one of the requirements to successfully setup and operate an iBGP configuration is that all iBGP clients need to have a BGP connection to all other iBGP clients. (= full mesh). This is required because an iBGP device only exchanges information about its own networks and it […]
Free Tool – Cisco Ironport C350 Safelist / Blocklist merge utility
If you have multiple Cisco Ironport C350 devices, you may have noticed that safelist / blocklist entries are bound to an individual device. So if your Ironport devices are both installed to handle incoming mails, end users need to manage safelists/blocklists on both devices in order to be sure that both devices operate in the […]
Cisco switch IOS cheat sheet
Reset to factory defaults : connect console (9600/8/None/1, no flow control) take out power cable press mode button (at the front), hold it, and put power cable back switch will go into recovery mode run : flash_init load_helper rename the config file : rename flash:config.txt flash:config.old run : boot When asked to enter the initial […]
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