Trouble with WPA in WDS between AE and WRT54G
Hi folks, I've have WDS with my AEBS as a remote base station and a Linksys WRT54G as the main base station. I've be running smoothly with 128 bit WEP encryption for about 6 months, so last weekend I tried upgrading the network to WPA personal .
As soon as I go to WPA the AEBS stops talking to the WRT54G. My G4 powerbook can get an get an IP address directly from the WRT54G (when it's in range) so I'm confident the WPA password is correct. Other than changing the wireless security settings I left the AEBS configuration the same as was working for WEP.
I'm running Airport Admin 4.2 and I've tried both firmware 5.6 and 5.5.1 -- same problem in each case. No connection between AEBS and WRT54G.
I had hoped the AEBS would send and error messages to the system console, but so far I have found no useful diagnostic to debug this problem.
Anyone out there get WPA encryption working for a wireless distribution system between AEBS and WRT54G ?
Thanks,
David
Thanks for the reply Henry.
Hmm... I'm running WRT54G firmware version: v4.20.6, May. 26, 2005.
The SSID's are the same (WEP still works) and personal WPA in the WRT54G is set up using a pre-shared key and TKIP algorithm.
And yet still with DHCP turned on I see that my AEBS is generating "local" IP addresses 256.xxx.xxx.xxx rather than getting an address from the range served by the WRT54G. Since this same configuration work using 128 bit WEP I'm assuming the issue is that the AEBS and WRT54G aren't talking properly.
Do you have a pointer to the previous discussion that suggested WPA on an Linksys AEBS WDS is possible? ... maybe I can contact the author directly.
Thanks again,
David
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[ 50.073874] wlan0: deauthenticating from 00:19:30:6b:1b:a2 by local choice (reason=1)
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[ 75.902267] wlan0: send auth to 00:1d:45:cd:c1:c2 (try 1/3)
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[ 75.904256] ath9k 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[ 75.904257] ath9k 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
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[ 75.908348] wlan0: 00:1d:45:cd:c1:c2 denied association (code=17)
[ 75.918844] wlan0: deauthenticating from 00:1d:45:cd:c1:c2 by local choice (reason=3)
[ 86.045293] wlan0: authenticate with 00:19:30:6b:1b:52
[ 86.059226] wlan0: send auth to 00:19:30:6b:1b:52 (try 1/3)
[ 86.061328] wlan0: authenticated
[ 86.061475] ath9k 0000:03:00.0 wlan0: disabling HT/VHT due to WEP/TKIP use
[ 86.061477] ath9k 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[ 86.061478] ath9k 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[ 86.064853] wlan0: associate with 00:19:30:6b:1b:52 (try 1/3)
[ 86.169949] wlan0: associate with 00:19:30:6b:1b:52 (try 2/3)
[ 86.179194] wlan0: RX AssocResp from 00:19:30:6b:1b:52 (capab=0x431 status=0 aid=22)
[ 86.179323] wlan0: associated
[ 89.123073] wlan0: deauthenticated from 00:19:30:6b:1b:52 (Reason: 4)
[ 89.147287] cfg80211: Calling CRDA for country: US
[ 105.770381] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None
[ 105.770386] e1000e 0000:00:19.0 eth0: 10/100 speed: disabling TSO
[ 105.770418] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 114.898216] wlan0: authenticate with 00:19:30:6b:1b:a2
[ 114.912130] wlan0: send auth to 00:19:30:6b:1b:a2 (try 1/3)
[ 114.914102] wlan0: authenticated
[ 114.914235] ath9k 0000:03:00.0 wlan0: disabling HT/VHT due to WEP/TKIP use
[ 114.914239] ath9k 0000:03:00.0 wlan0: disabling HT as WMM/QoS is not supported by the AP
[ 114.914241] ath9k 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
[ 114.914348] wlan0: associate with 00:19:30:6b:1b:a2 (try 1/3)
[ 114.916916] wlan0: RX AssocResp from 00:19:30:6b:1b:a2 (capab=0x401 status=17 aid=0)
[ 114.916920] wlan0: 00:19:30:6b:1b:a2 denied association (code=17)
[ 114.937999] wlan0: deauthenticating from 00:19:30:6b:1b:a2 by local choice (reason=3)
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[ 125.078431] wlan0: send auth to 00:19:30:6b:1b:52 (try 1/3)
[ 125.081945] wlan0: authenticated
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[ 125.082095] ath9k 0000:03:00.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP
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I'm having trouble with PFI 24..31 signals and can't program to higher drive
Hi all,
I'm having trouble setting up my PFI<24..31> signals on my PXIe-6556. According to the specifications, I can drive these signals to +/-85mA. I have not been able to achieve that using the static PFI method using NI-HSDIO. I see the voltage dropout rather quickly. Using a 500 ohm resistor to ground on this signal, the voltage collapses from 3.3V to 3.0V with only approximately 6mA of current across resistor.
What am I doing wrong?
Solved!
Go to Solution.
Attachments:
PFI_ENABLE.vi 23 KBTo explain the circuit, it is simplified a 3.3V power rail connected to the 50 ohm output impedance, which acts like a series resistance. Given this, we do not behave like a LDO or a current supply, and any load connected to the line is going to behave much like a voltage divider rather than a regulator.
The case of tying the line directly to GND, you will see 3.3V / 50 ohm to get 66 mA of output current. The only way to get the full 85 mA is to tie the line to a -0.9 V reference, which is not very practical I understand. Talking to a HW engineer here, the spec is mainly based off the buffer we use and what it is capable of. I think it makes more sense when it is understood that the line is bidirectional, and it can source/sink 85 mA when being acted upon by an external circuit.
Given all of this, I think it won't be suited well enough to drive a 500 ohm load to the specifications you need. You'll need to have some external circuit that can source 85 mA, or another device such as an SMU. The PPMU on the 6556 can source 32 mA (and beyond, we are not current limited, but anything above 32 mA is not within specification and sustained operation outside of spec could damage the board over time). You can use the PPMU as a source, since it acts more like an SMU and has a sense feedback loop to regulate a voltage/current on the line.
Sorry for the inconvenience, hopefully you have enough information to move forward. Thanks.
Kyle A.
National Instruments
High Speed Digital I/O Product Support Engineer - R&D -
HUGE Troubles with xServe RAID formatted 10.4 and using it with SLS 10.6
Hi All,
We met today a huge trouble using an Apple xServe RAID (formatted HFS+ with a Mac OS 10.4 Server PowerPC G5).
This RAID has been plugged with a new xServe Intel Xeon (Model xServe 3.1), MacOS X 10.6.2, Apple FiberChannel card 4 GB, the link is at 2 GB.
There is also an Infortrend RAID FiberChannel 4 GB Fiber to SATA RAID attached to this new Intel Xeon server : this RAID drive mounts correctly, no troubles.
BUT the "old" xServe RAID is not able to mount at all while plugged with this new Intel Xeon, DiskUtility claims the volume needs repair !!! We try a repair = failed !!!
The xServe RAID has been formated under 10.4.6, HFS+ Journaled.
The Infortrend has been formated under 10.6.2, HFS+
Does anyone met a such case ??? We tried using SFP to SFP Copper cable or Optical Fiber + SFP/LC Transceiver = same results
Many thanks a lot for your opinion !!!
Regards.What if you connect your "old" xServe RAID to a non SLS server if you have one available? Preferably one running 10.4.x server to match your HFS format. If the data on the old RAID is so critical that you can't afford to lose it, you could always pickup a used PPC w/ a fibre channel card and install 10.4 server on it just so you can transfer the data. Curious to see what you end up doing.
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Troubles with timeout using java.nio.channels and non-blocking sockets
Hello.
I have a server application that employs java.nio.channels with non-blocking sockets.
The server waits for connections. The client should connect and be first in sending data.
Timeouts are significant! If client exceeds the allowed time to send data, the server should break the connection.
The huge trouble I've discovered that I cannot control the timeout when client connects but remains silent.
My code looks as follows:
<pre>
Selector oSel;
SocketChannel oSockChan;
Socket oSock;
SelectionKey oSelKey;
Iterator<SelectionKey> oItSelKeys;
int iCurrState, iMask, iCount;
iCurrState = INT_SERVER_WORKING;
iMask = SelectionKey.OP_ACCEPT | SelectionKey.OP_CONNECT | SelectionKey.OP_READ | SelectionKey.OP_WRITE;
while ( iCurrState == INT_SERVER_WORKING )
try
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iCount = oSel.select();
if ( iCount > 0 )
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break;
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oSelKey.interestOps(0);
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this.getReader().add(oSelKey); *// sending key to reading thread*
break;
case SelectionKey.OP_WRITE :
oSelKey.interestOps(0);
((MyRequest) oSelKey.attachment()).inResponse(); *// preparing response*
this.getWriter().add(oSelKey); *// sending key to writing thread*
break;
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default :
*// nothing to do*
catch ( IOException oExcept )
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</pre>
Timeouts are easily controlled by reading and writing threads (see OP_READ and OP_WRITE ).
But when a client just connects without consequent data send, the state of this connection remains as OP_ACCEPT. The connection remains open for arbitrarily large time and I cannot control it!
Please help with idea how can I terminate such connections!How can I process the keys that weren't selected at the bottom of the loop? Should I use the method keys() ?Yes. Form a new set from keys() and removeAll(selectedKeys()). Do that before you process selectedKeys().
And the second moment: as I understood a single key may contain several operations simultaneously? Thus I should use several if's (but not if/else 'cause it's the equivalent of switch ... case ).If there is anything unclear about 'your switch statement is invalid. You need an if/else chain' I fail to see what it is. Try reading it again. And if several ifs were really the equivalent of "switch ... case", there wouldn't be a problem in the first place. They're not, and there is. -
When I downloaded IOS7, I found that the reminders/task app and how it interacts with Outlook Exchange is much more difficult to use. Some of the issues that I am having are...
1. Trying to edit my task on my phone is not possible, if the notes are lengthy. When you click on the text to edit data near the top, it will scroll to the bottom and not allow you to edit the text because you cant see it.
2. Now all of my task are in one long list. I can not move from day to day like we could in previous version IOS6
3. When I do edit a short task reminder and click done, it crashes and completly goes away. It does save the edit though
4. You can only add task at the bottom of each days reminders. This is very inconvient and much more difficult than IOS6
5. There is a major delay or latency when interacting inside of reminders in this version. Much more than IOS6. It is very unstable and quirky.
I have never seen Apple take a step back with a product until now. I am a huge Apple fan and always will be, so I am hoping they make enhancements to fix these issue. It is a big time prodcutivity killer.
Thanks for any and all help you can give.
Troy MeachumSome power supplies or designed so that if there is a short or overload they shut them selfs off and some will not turn back on. Some have a relay that will click back on and work, some you have to cycle the power switch. Those that won't come back on will have to be replaced. I'm not saying that yours is that type as I have no way of telling. But if you have a friend who will loan you a good power supply you might try it. As someone else said just turning off the power will not darn all the power from some motherboards. To test this turn off your power supply than turn on the computer with the start botton. Mine will flash the lights and fans will start to spin than die. So every time you turn off computer to work on it. After turning off PSU hit the start botton to drian any power left in it before working on it. Also do this after unplugging it just to make sure.
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