Airport country code keeps changing!

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20 Nov 2005
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Bristol
I woke up my MacBook Pro from sleep this evening, having used it perfectly fine a mere 10min earlier, and found that it was refusing to connect to my wireless network. After half an hour of troubleshooting, I find that for some reason, OSX has decided to set my airport's locality to 'US', meaning channel 13, on which I broadcast my WLAN, is no longer reachable. Upon further inspection I find the following entries appearing in Console every so often:

Code:
19/10/2010 22:35:04	kernel	directed SSID scan fail
19/10/2010 22:35:25	kernel	en1: 802.11d country code set to 'X3'.
19/10/2010 22:35:25	kernel	en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140
19/10/2010 22:35:27	kernel	en1: 802.11d country code set to 'US'.
19/10/2010 22:35:27	kernel	en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 149 153 157 161 165

This has literally just started happening out of the blue. I have changed nothing whatsoever software or hardware wise. The laptop was literally just put to sleep, woken up, and now it's doing this. :confused: I'm temporarily set up on channel 11, but ideally I'd like to get back to the less crowded channel 13. Why on earth is it doing this?
 
The general consensus on various Mac forums seems to be that this type of thing happens because someone is running an illegally imported US router nearby, which is sending out 'US' 802.11d packets. This would seem to agree with my own experience - the problem only happens when my laptop is at home. I guess I'll just have to put up with channel 11 then, or go hunting for the culprit!

I don't seem to have come off too badly though, there are stories where people have been receiving packets from routers assigned to countries which don't share any WIFI channels with the UK at all, and so can't connect whatsoever. Nightmare.

Is your wireless router an O2/ BE box by any chance?

It is, but only as a modem. I use a WRT54GL as my router. Out of interest though, why?
 
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