ath0 spontaneously binding to a channel?

[Steven M. Bellovin]

Twice in the last few weeks, my ath0 interface was somehow bound to a
channel when running dhclient. Needless to say, it did not succeed in
finding an AP until I reset it to 'chan -1'. Should I just add that to
the ifconfig attributes in my dhclient.conf file? Why is this happening
to start with?

--Steven M. Bellovin, http://www.cs.columbia.edu/~smb

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[David Young]

Post by Steven M. Bellovin
Twice in the last few weeks, my ath0 interface was somehow bound to a
channel when running dhclient. Needless to say, it did not succeed in
finding an AP until I reset it to 'chan -1'. Should I just add that to
the ifconfig attributes in my dhclient.conf file? Why is this happening
to start with?

What do you mean by "bound to a channel" ?

Dave

[Steven M. Bellovin]

Post by David Young

Post by Steven M. Bellovin
Twice in the last few weeks, my ath0 interface was somehow bound to a
channel when running dhclient. Needless to say, it did not succeed in
finding an AP until I reset it to 'chan -1'. Should I just add that to
the ifconfig attributes in my dhclient.conf file? Why is this happening
to start with?

What do you mean by "bound to a channel" ?

I did 'ifconfig ath0'; it showed a channel but no carrier. It didn't seem
to matter what the channel was. I tried repeatedly to restart dhclient,
suspend/resumed, etc., to no avail. In both cases, I was able to restore
functionality by by doing 'ifconfig ath0 chan -1'.


--Steven M. Bellovin, http://www.cs.columbia.edu/~smb

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[Greg Troxel]

The only time I've seen that is after doing 'ifconfig ath0 chan 1' or
some other number, and 'ifconfig ath0 -chan' puts it back to scan
mode.

Did you run kismet?

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[Steven M. Bellovin]

Post by Greg Troxel
The only time I've seen that is after doing 'ifconfig ath0 chan 1' or
some other number, and 'ifconfig ath0 -chan' puts it back to scan
mode.
Did you run kismet?

Generally, I've run that *after* I had the problem, in an effort to figure
what was going on -- did I actually see the APs I thought were present. I
don't *think* I ran it beforehand.

--Steven M. Bellovin, http://www.cs.columbia.edu/~smb

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