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SonicWall TZ150 drops all wireless connections

Posted on 2008-10-07
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Last Modified: 2012-06-27
I have a TZ150 with firmware SonicOS Standard 3.1.0.15-95s. I am experiencing intermittent wireless connectivity. This morning I had 4 users successfully connected, and then all 4 were denied access for about 10 minutes and were not able to reconnect to the SSID.

I looked in the firewall logs and found these:

10/07/2008 08:33:31.416 - WLAN client null probing - 0.0.0.0 - 0.0.0.0 -
10/07/2008 08:33:01.272 - Packet dropped by wlan vpn traversal check - 172.16.31.196, 137, WLAN - Our Public IP, WAN -
10/07/2008 08:32:29.656 - WLAN client null probing - 0.0.0.0 - 0.0.0.0 -

These are repeated several times. Any ideas?
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Question by:sangwen
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by:GidonP
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I would look at at least two items, first on the device do you have the device software or windows running the connection, second, look at your firewall, check to see what level of encryption that you have and that a, it matches the devices, and that b, that you do not have mac spoofing enabled. Without more info on the environment I don't know what else to say.

Gidon
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by:sangwen
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Here's a diagram of what hardware is out there.

**Internet** --> [Verizon Modem] ---> [SonicWall] --> Users connect wirelessly

The users are on a mix between Vista (32bit) and XP. They are connecting to the SonicWall's SSID using a preshared key. DHCP is handled at the SonicWall. Wireless users are on 172.16.31.0/24 and wired users are on 10.3.1.0/24.

They are all connected now, but I can't figure out what caused the wireless outage. The few wired users maintained their connection. I can only assume that it is related to the firewall entries I posted earlier. Those are the only error/warning messages I have.

The encryption mode is WPA -PSK.
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by:sangwen
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I had the same issue occur this morning. This is what was in the log during the outage.

10/08/2008 08:25:43.576 -       802.11 Management                   -        -       00:00:00:00:00:00 - wlan timeout
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       00:00:00:00:00:00 - Disassocicated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       00:00:00:00:00:00 - Deauthenticated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       00:00:00:00:00:00 - Disassocicated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       00:00:00:00:00:00 - Deauthenticated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       00:00:00:00:00:00 - Disassocicated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       FF:FF:FF:FF:FF:FF - Deauthenticated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       FF:FF:FF:FF:FF:FF - Disassocicated
10/08/2008 08:25:49.912 -       802.11 Management                   -        -       FF:FF:FF:FF:FF:FF - Deauthenticated
10/08/2008 08:25:49.928 -       WLAN enabled by administrator      
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sangwen earned 0 total points
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The problem was resolved by updating the firmware and removing IDS.
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by:GidonP
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Great, Happy that you got it done.... have a good week
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