When to change Default Tx Key w/64-bit passphrase - befw11s4

Discussion in 'Cisco/Linksys Wireless Routers' started by pvman, Jul 22, 2005.

  1. pvman

    pvman Network Guru Member

    WAP is a BEFW11S4 v2 w/firmware 1.45 (upgrading to 1.45.10 soon).

    I do know the WAP and client should be set to use the same key, but is there a difference between the keys?

    If so, does it matter which of the 4 keys I choose?

    Is it necessary to set a Default Tx Key on a CLIENT if I am also using a passphrase (i. e., can I ignore the keys if I use a passphrase to generate them)?
  2. DocLarge

    DocLarge Super Moderator Staff Member Member

    You have two options:

    1) You can either type in a passphrase and let the WAP generate a key for you to use


    2) You can type in your own 26 digit hexadecimal string in the first key position. If you do it this way, just make sure it's the exact same key you set for all of your other computers. Using 26 string hex along with 128 bit encryption or better is good.

  3. pvman

    pvman Network Guru Member

    Forgive me if I was unclear; My question really refers to the client or PC Node's configuration.

    I'll try again: If I use the same passphrase on the PC as I used on the WAP, do I also have to specify which of the 4 keys will be the "Default Tx Key" on either device (WAP or PC)?

    Is any one of them "better" than the other?

    If I must do 64-bit encryption, in addition to periodically changing the passphrase, should I also pick a different "Default Tx Key"?
  4. DocLarge

    DocLarge Super Moderator Staff Member Member

    Whatever passphrase you use on the WAP is the same passphrase you use on the pc. If you decide to use 26bit hexadecimal string you think of on your own, just enter it into key 1 on your WAP and make sure you input the same key into whatever device you want to run under encryption. Again, 128 is best.

  5. TazUk

    TazUk Network Guru Member

    No. Just enter a key in box 1 on the BEFW11S4, set the default TX key to 1 and enter the same key when prompted at the PC end. The other three boxes can remain blank, although some WAP's/routers populate them with the key entered into box 1.
  6. pvman

    pvman Network Guru Member


    I think I understand. So, if I set "key 2" to be my "Default Tx Key", then I need to use the string populating Key 2's field on my client device.

    One more question: Under what conditions will my WAP resort to using a non-default Tx key? In other words, is this something that can occur without notice (or user intervention)? If so, what is the effect to the client devices?
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