How to scan for wifi hotspots?
Jeff Vian
jvian10 at charter.net
Tue Dec 28 07:03:20 UTC 2004
On Sat, 2004-12-25 at 13:59 -0500, Scot L. Harris wrote:
> On Fri, 2004-12-24 at 17:08, Timothy Murphy wrote:
> > Scot L. Harris wrote:
> >
> > > try
> > >
> > > /sbin/iwlist scan
> >
> > sudo iwlist scan
> > lo Interface doesn't support scanning.
> > eth0 Interface doesn't support scanning : Operation not supported
>
> If it was supported you would have seen something like this:
>
> eth0 Scan completed :
> Cell 01 - Address: 00:0F:3D:3F:1D:CC
> ESSID:""
> Mode:Master
> Encryption key:on
> Channel:6
> Quality:127/0 Signal level:-82 dBm Noise
> level:-209 dBm
> Cell 02 - Address: 00:0C:41:AC:F9:50
> ESSID:"linksys"
> Mode:Master
> Encryption key:off
> Channel:6
> Quality:123/0 Signal level:-86 dBm Noise
> level:-209 dBm
> Cell 03 - Address: AA:50:23:35:5F:4E
> ESSID:""
> Mode:Ad-Hoc
> Encryption key:on
> Channel:11
> Quality:209 Signal level:0 Noise level:47
>
>
> Cell 1 and 2 are access points, Cell 3 is a computer system. Cell 2
> most likely could be used to establish a connection to the Internet with
> since they don't have wep enabled and you have the ESSID. Someone did
> not configure their linksys access point. Cell 1 appears to have
> security enabled.
>
> But again, if you are using ndiswrappers this probably won't work.
>
I am using ndiswrapper with an airlink adapter and I get this with
iwlist scan
[jeff at bluebird jeff]$ /sbin/iwlist scan
lo Failed to read scan data : Operation not supported
eth0 Failed to read scan data : Operation not supported
eth1 Scan completed :
Cell 01 - Address: 00:12:17:04:5F:FA
ESSID:"jeff"
Mode:Managed
Frequency:2.437GHz
Quality:1/1 Signal level:-40 dBm Noise level:-200 dBm
Encryption key:on
Bit Rate:1Mb/s
Bit Rate:2Mb/s
Bit Rate:5.5Mb/s
Bit Rate:11Mb/s
Bit Rate:18Mb/s
Bit Rate:24Mb/s
Bit Rate:36Mb/s
Bit Rate:54Mb/s
Extra:bcn_int=100
cell 01 is my access point.
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