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Entering a WEP hex key for preferred AirPort network Network
After updating the firmware of my WLAN router (Fritz Box SL WLAN), my iBook (OS 10.3.9) stopped connecting automatically to my router, and also gave an annoying "error joining" message. This hint removed the error message, but automatic reconnect still failed.

Solution: when entering a WEP hex key in System Preferences > Network > Automatic Connect/Preferred Network, be sure to prepend 0x before the key itself (no spaces between 0x and the key).
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Entering a WEP hex key for preferred AirPort network | 6 comments | Create New Account
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Entering a WEP hex key for preferred AirPort network
Authored by: alfrank on Feb 27, '06 07:51:32AM

I've always been using the dollar sign "$" for that purpose...

It's documented in this Apple article: http://docs.info.apple.com/article.html?artnum=106424



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Entering a WEP hex key for preferred AirPort network
Authored by: umijin on Feb 27, '06 07:58:37AM

Hmm.... I don't understand why this fixes things. Not doubting it works - but why would it?

I've encountered this problem in the past, and always had to reboot the wireless network to make stuff work right.



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Entering a WEP hex key for preferred AirPort network
Authored by: bnew on Feb 27, '06 08:12:01AM

This works because Apple offers 3 ways to enter a WEP key - regular text, which it converts to hex, ASCII and hex. To a computer, 0x or $ before a series of letters & numbers designates it as hex (hexadecimal, or base 16). This is a standard method of designating hex which has been in use for decades.



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Entering a WEP hex key for preferred AirPort network
Authored by: barefootguru on Feb 27, '06 10:18:00AM

I've got System Preferences set to join a Preferred Network, and in the WEP options (though I use the much more secure WPA) there are options for WEP Password, WEP 40/128-bit Hex and WEP 40/128-bit ASCII.

Can you not use the hex option?



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Entering a WEP hex key for preferred AirPort network
Authored by: ac83969 on Jul 08, '07 02:46:51PM

I'm having a similary problem.. at home we have a Belkin router set up which connects without problems to a HP laptop but I keep getting 'error connections to wireless lan' message when I try to connect my MacBook pro to the same wirless connection.
I've tried (what feels like) every possible combination including putting $ adn 0x infront of the 10 digit WEP password but with not luck..

Any more suggestions for a relatively new mac user.. help please!



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Entering a WEP hex key for preferred AirPort network
Authored by: dmlounsbury on Jul 03, '08 07:29:42PM

What worked for me:

-Make sure you have the latest firmware for your Express
-Start with a $ but make sure all the letters are in ALL CAPS, for example:

$DEAD99BEEF

And of course, only use 0-9 and A-F in your hex passwords



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