wireless security WPA-PSK fails to connect

Discussion in 'Cisco/Linksys Wireless Routers' started by xpgel, Dec 16, 2004.

  1. xpgel

    xpgel Network Guru Member

    OS : Windows 2000 Server
    Router : WRT54G (SG-UK) Version 2 , firmware 3.01.3
    USB Wirless Network Card: WUSB54G Version 4 , updated driver from

    Disabled ssid+Enabled Mac filter connected normaly no problems, Able to connect to internet,browse,ftp

    The problem started once i enabled wireless security WPA-PSK, wireless network connects and disconnects every 2 seconds!!! cannot use the wireless network, the linksys monitor shows the both signal bars which appears and disappears.

    Tried to use static ip, also enabled ssid and disabled mac filter, no use same problem it connects and disconnects every 2 seconds!!

    EVerytime i change the router setting i did this
    1. Shut down the computer.
    2. Unplug the router’s power cable.
    3. Unplug the Broadband modem’s power cable.
    4. Wait for 30 seconds.
    5. Plug in the Broadband modem’s power cable and wait for its lights to stop blinking.
    6. Plug in the router's power cable once the modem’s lights stop blinking.
    7. Finally, start up the computer and test the Internet connection.

    I think its something to do with the AEGIS protocol
    some info: http://8help.osu.edu/2161.html

    Any hints....

  2. howardp6

    howardp6 Network Guru Member

    I checked the Microsoft Knowledge Base and WPA is not available with Windows 2000 Server natively you have to obtain a 802.1X client from Microsoft. WPA is not supported by Microsoft for clients. A Radius Server is supported on Windows 2000 Sever with PEAP, when running IAS. Windows 2003 supports WPA. The WUSB54G does support WPA.
  3. xpgel

    xpgel Network Guru Member

    This is what i read from MS website

    (Scroll Down to this message in KB)
    For wireless clients running Windows 2000 (or clients
    running Windows XP SP1 or Windows Server 2003 and using
    a wireless network adapter that does not support the
    Wireless Zero Configuration service), you must obtain
    and install a new WPA-compliant configuration tool from
    your wireless network adapter vendor.
  4. Esquire

    Esquire Mesquire Staff Member Member

  5. xpgel

    xpgel Network Guru Member

    I tired this tool now, the same problem occurs, connects and disconnects the wireless usb network card.
  6. Esquire

    Esquire Mesquire Staff Member Member

    Looking back at earlier replies, and after some digging around, I think howardp6 is correct in stating WUSB54Gv4 has no WPA support.

    I took at look at the entries in INF file for V.4 driver and I could only find WPA Group Key settings under APConfig. My guess is that this refers to ad-hoc mode. Under the section Authentication, there are only entries for WEP settings.

    The US V.1 driver has WPA support, but for Windows XP only.

    And in a typical Linksys messed-up fashion, the PDF filename for the datasheet accompanying V.4 driver download is labelled as WUSB54Gv1_ds, but it only mentions WEP support.
  7. xpgel

    xpgel Network Guru Member

    Will this wpc54g card support wpa-psk under windows 2000

  8. Esquire

    Esquire Mesquire Staff Member Member

    Sorry. Linksys isn't very clear on whether the Wireless Connection Manager supports WPA in Windows 2000 and I haven't tried mine with WPA under the operating system.
  9. xpgel

    xpgel Network Guru Member

    No Problems, I have given up on linksys,
    i called tech support they have no clue. Tech support asked me carry my PC to there support center but the problem is my casing is a server based casing its very heavy to carry.

    Next time i better check the fourms and do some research before i buy after spending whole of last week (like 30Hrs+ !!!) trying to fix things i have no choice but to admit my defeat to Linksys...... ok linksys you won the battle of drivers

    So after reading some more info on the web even wep 128 is not secure!!!
    so i have no choice but to use my router for wired connection only.

    Linksys better clean up your drivers etc all messed up here and there if the same happens in future its going to bring down linksys at some point of time.

    Lessons learned.
    Windows 2000 doesn't support WPA this is very clear and its up to the vendors to provide the WPA support.

    Linksys tech support is very bad., there links for the drivers is messed up.

    Thanks for responding to my messages, let me know if any one found a soultion my problem or is there any other USB Card that supports WPA under windows.
  10. Esquire

    Esquire Mesquire Staff Member Member

    Will post here if I do find more info on subject.

    While WEP is not as secure as WPA/WPA2, it is not totally useless and should provide sufficient protection in most cases. Security is best in layers anyway and one should always implement other constraints to supplement the encryption method being used.
  11. xpgel

    xpgel Network Guru Member

    Can I try to secure my wireless using this method?
    DHCP Lease allow only one client.

    will this be secure
  12. Esquire

    Esquire Mesquire Staff Member Member

    It is something you can definitely consider. It won't increase overall encryption security, but restricting DHCP assignment only to the number of your clients can help prevent someone from joining your network after cracking WEP Key. You can also consider combining with MAC Address Filtering. Personally, any restrictive measure used in conjunction with data encryption is better than just relying on the encryption technology alone - who knows what major flaws they will find in WPA? I just read a review this weekend on the latest generation of WEP Key cracking tools - they were talking about the fastest being able to do it in seconds :twisted: so any restrictive measure will help.

    PS. If you send a lot of sensitive data over your network, I do suggest that you do this over a wired network as a preventive measure. I don't even do my online banking over my own WPA wireless network :wink:
  13. RoundSparrow

    RoundSparrow Network Guru Member

    I tried to convert to WAP from WEP and also failed. I'm not new at networking, Windows or Wifi (15 years, 12 years, 4 years respective).

    I have two new Centrino notebooks (Thinkpad T42 / X40), one with the Intel B 2100 chipset and one with the 2200BG chipset. I have the latest Windows Updates, latest firmware from IBM, latest firmware from Linksys.

    It just won't connect. XP asks for the passphrase and refuses to join the network. Tried several different passwords, tried both types of encryption... changed the name of the SSID to make sure XP wasn't using old info...

    No go. I gave up for now; If I can't get two brand new clean installed XP machines to talk XP, I have doubts I'll get my PDA and WiFi cards to work.

    Maybe the problem is that Intel Centrino 2100/2200 has a common problem. Don't know.
  14. Esquire

    Esquire Mesquire Staff Member Member

    If I understand what you wrote correctly, you shouldn't be using the Passphrase to connect your clients - use one of the 4 Keys generated by the Passphrase instead. For 64bit encryption, the Key consists of 10 hex digits whereas for 128bit it's a 26 hex digit Key. Have I read what you wrote correctly?

    The Passphrase functions as a Key generator on a Linksys router, and one doesn't need to use it to create one's WEP Keys.
  15. Esquire

    Esquire Mesquire Staff Member Member

    It appears that even the WUSB54G V.4 has WPA support.

    According to Ralink Technology, the WUSB54G V.4 OEM, their 2500 series chipset, on which I think V.4 is based, is listed to have WPA and AES support, presumably under Windows XP only.

    I also read someone's reply in another forum who said his V.4 has WPA support, so I'm trying to get some confirmation from him and hopefully with some screen capture that I can post here.
  16. xpgel

    xpgel Network Guru Member

    If windows 2000 supports Radius Server how do i get Radius server?, that works with my router + USB Network.

    I tested the USB NW on both xp+win 2003 PC's WPA works wihout any problems.

    Thanks for your time and effort.
  17. Esquire

    Esquire Mesquire Staff Member Member

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