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Via SwissInfo: “The computer industry is the only industry that is more fashion-driven than women’s fashion,” Oracle founder Larry Ellison commented on cloud computing recently. “Maybe I’m an idiot, but I have no idea what anyone is talking about. What is it? It’s complete gibberish. It’s insane.” I think there’s more to it than just . . . → Read More: Larry Ellison on “Cloud Computing” One pain with Cisco IOS is trying to get a configured interface back to defaults. Half the time you don’t even remember what those were. If it’s a sub-interface you can “no” it, but you will still have configuration left behind: cisco(config)#no interface ATM1/0.1 Not all config may be removed and may reappear after reactivating . . . → Read More: Defaulting a Cisco interface… I can never seem to remember how to “remove” a VLAN on a switch (eg: Cisco 6500) running the older CatOS. The new IOS based switches are much easier. Anyway, it’s actually quite simple, just force the port to VLAN 1 (assuming that is your default/native VLAN). For example if port 6/5 was set to . . . → Read More: How to remove a VLAN from a port in CatOS… Just like Unix you can add a static host to the Windows system. On Windows XP the file is usually found in the “intuitive” location here (may change depending on where you loaded Windows): C:\Windows\System32\drivers\etc This is also where the “lmhosts” file is found. The format is in standard ARPANET format. For more . . . → Read More: Where to find the Windows XP “hosts” file So what’s the difference? Not much or a lot depending on your opinion. WPA uses TKIP for key management, whereas WPA2 uses AES-CCMP. Usually depending on how the AP has been set up, you can use either (TKIP or AES-CCMP) interchangeably, thus using WPA or WPA2 as needed. Many older devices like those running Windows . . . → Read More: WPA versus WPA2? When researching using WPA on Ciscos I ran into a lot of useful URLs as resources. If you’re in the same bind, you may find them helpful too: http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801bd035.shtml http://articles.techrepublic.com.com/5100-1035-6148543.html http://articles.techrepublic.com.com/5100-1035-6148581.html http://i.t.com.com/i/tr/downloads/home/gou_secure-wireless-guide.pdf http://www.cisco.com/en/US/products/sw/secursw/ps2086/products_configuration_example09186a00801df0e4.shtml http://www.ccitraining.net/courses/cwls.shtml http://projectdream.org/publications/windows/eap-peap-cisco-windows-2003.html http://www.networkcomputing.com/1409/1409ws13.html http://www.cisco.com/en/US/products/hw/wireless/ps430/products_tech_note09186a008024aa4f.shtml http://cio.cisco.com/univercd/cc/td/doc/product/wireless/airo1100/accsspts/ap11icg/ivicgaut.htm http://www.networkworld.com/research/2002/0506whatisit.html http://tldp.org/HOWTO/html_single/8021X-HOWTO http://en.wikipedia.org/wiki/IEEE_802.1Q http://www.cisco.com/en/US/docs/wireless/access_point/12.2_15_JA/configuration/guide/s15vlan.html http://hardware.mcse.ms/archive80-2005-8-223677.html http://www.cisco.com/univercd/cc/td/doc/product/access/mar_3200/wlsnotes/cfwlsmod.htm http://www.cisco.com/univercd/cc/td/doc/solution/mblacrdg.pdf http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800a7af6.shtml http://www.cisco.com/warp/public/cc/pd/witc/ao1200ap/prodlit/wrsec_an.htm Not a pretty list, but still good to . . . → Read More: WPA resources If you’re investigating things like enterprise WPA and/or NAC based network control you’ll probably run into the fact that it uses 802.1x protocol. So what is 802.1x? Basically the long and short of it is IEEE 802.1x is just a protocol to pass EAP over wired/wireless LANs. EAP on the other hand is just a . . . → Read More: What is 801.1x? If you must use WPA-PSK (meaning WPA with a pre-shared key, rather than WPA using 802.1x authentication via Radius), make sure your key is sufficiently long. Ideally 20 characters or more. To quote: Robert Moskowitz’s article, “Weakness in Passphrase Choice in WPA Interface,” describes a theoretical attack on WPA passwords. The tools WPA-psk-bf, CoWPAtty and . . . → Read More: If using WPA-PSK, use a long key! |
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