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-   -   unable to scan for networks period with working wireless (http://www.linuxquestions.org/questions/linux-wireless-networking-41/unable-to-scan-for-networks-period-with-working-wireless-542073/)

WOP1337 03-31-2007 12:15 AM

unable to scan for networks period with working wireless
 
I use Slackware 11. I am trying to scan for networks any way possible and realize I most likely have a core problem with the OS. First I tried to install Kismet and scan for networks, everything runs ok but doesnt pickup a single packet. In KWiFiManager, I am unable to see any wireless networks as well although I am currently connected to one (my home network). Even iwlist says that:

eth0 Interface doesn't support scanning : Operation not supported.

All three of those progs are unable to scan any networks. I still connect to my home network fine but that is about it. If I knew a SSID in range, I would be able to connect to that network as well. I have a feeling it is some setting in /etc/rc.d/rc.wireless.conf or something but could not come up with anything. Any help is much appriciated.

MY rc.wireless.conf :

VERBOSE=1

case "$HWADDR" in

## NOTE : Comment out the following five lines to activate the samples below ...
## --------- START SECTION TO REMOVE -----------
## Pick up any Access Point, should work on most 802.11 cards
*)
## INFO="Any ESSID"
## ESSID="any"
## ;;
## ---------- END SECTION TO REMOVE ------------


# Here are a few examples with a few Wireless LANs supported...
# The matching is done on the first 3 bytes of the MAC address

# SMC2835W EZ Connect g 2.4GHz 54 Mbps Wireless Cardbus Adapter
00:04:E2:*)
INFO="SMC2835W EZ Connect g 2.4GHz 54 Mbps Wireless Cardbus Adapter"
# ESSID (extended network name) : My Network, any
ESSID=""
# NWID/Domain (cell identifier) : 89AB, 100, off
NWID=""
# Operation mode : Ad-Hoc, Managed, Master, Repeater, Secondary, auto
MODE="Managed"
# Frequency or channel : 1, 2, 3 (channel) ; 2.422G, 2.46G (frequency)
FREQ=""
CHANNEL="7"
# Sensitivity (cell size + roaming speed) : 1, 2, 3 ; -70 (dBm)
SENS=""
# Bit rate : auto, 1M, 11M,54M
RATE="auto"
# Encryption key : 4567-89AB-CD, s:password
# Example for 40-bit encryption:
#KEY="883e-aa67-21 [1] key 5501-d0da-87 [2] key 91f5-3368-6b [3] key 2d73-31b7-96 [4]"
# Example for 104-bit encryption (aka 128-bit WEP):
#KEY="d5ad2f05abd048ecf10b1c80c7"
KEY=""
# RTS threshold : off, 500
RTS=""
# Fragmentation threshold : off, 1000
FRAG=""
# Other iwconfig parameters : power off, ap 01:23:45:67:89:AB
IWCONFIG=""
# iwspy parameters : + 01:23:45:67:89:AB
IWSPY=""
# iwpriv parameters : set_port 2, set_histo 50 60
IWPRIV=""
;;

# Multiband Atheros based 802.11a/b/g universal NIC cards
00:05:4E:*)
INFO="Multiband Atheros based 802.11a/b/g universal NIC"
# ESSID (extended network name) : My Network, any
ESSID=""
# Operation mode : Ad-Hoc, Managed, Master, Repeater, Secondary, auto
MODE="Managed"
# Frequency or channel : 1, 2, 3 (channel) ; 2.422G, 2.46G (frequency)
FREQ=""
CHANNEL="7"
# Bit rate : auto, 1M, 11M,54M
RATE="auto"
# Encryption key : 4567-89AB-CD, s:password
# Example for 40-bit encryption:
#KEY="883e-aa67-21 [1] key 5501-d0da-87 [2] key 91f5-3368-6b [3] key 2d73-31b7-96 [4]"
# Example for 104-bit encryption (aka 128-bit WEP):
#KEY="d5ad2f05abd048ecf10b1c80c7"
KEY=""
# Other iwconfig parameters : power off, ap 01:23:45:67:89:AB
IWCONFIG=""
# iwspy parameters : + 01:23:45:67:89:AB
IWSPY=""
# iwpriv parameters : set_port 2, set_histo 50 60
IWPRIV=""
;;

# Lucent Wavelan IEEE (+ Orinoco, RoamAbout and ELSA)
# Note : wvlan_cs driver only, and version 1.0.4+ for encryption support
00:60:1D:*|00:02:2D:*)
INFO="Wavelan IEEE example (Lucent default settings)"
ESSID="Wavelan Network"
MODE="Managed"
#RATE="auto"
KEY="s:secu1"
# To set all four keys, use :
#KEY="s:secu1 [1] key s:secu2 [2] key s:secu3 [3] key s:secu4 [4] key [1]"
# For the RG 1000 Residential Gateway: The ESSID is the identifier on
# the unit, and the default key is the last 5 digits of the same.
#ESSID="084d70"
#KEY="s:84d70"
;;

# Cisco/Aironet 4800/3x0
# Note : MPL driver only (airo/airo_cs), version 1.3 or later
00:40:96:*|00:02:8A:*)
INFO="Cisco/Aironet example (Cisco default settings)"
ESSID=""
# To set all four ESSID, use iwconfig v21 and the same trick as above
MODE="Managed"
#RATE="11M auto"
#KEY="d5ad2f05abd048ecf10b1c80c7"
KEY="off"
;;

# Samsung MagicLan (+ some other PrismII cards)
# Note : Samsung binary library driver, version 1.20 or later
00:00:F0:*|00:02:78:*)
INFO="Samsung MagicLan example (Samsung default settings)"
ESSID=""
MODE="Managed"
CHANNEL="4"
RATE="auto"
#KEY="883e-aa67-21 [1] key 5501-d0da-87 [2] key 91f5-3368-6b [3] key 2d73-31b7-96 [4]"
#IWCONFIG="power on"
;;

# Raytheon Raylink/WebGear Aviator2.4
# Note : doesn't work yet, please use for debugging only :-(
00:00:8F:*|00:00:F1:*)
INFO="Raylink/Aviator2.4 example (Aviator default ad-hoc setting)"
ESSID="ADHOC_ESSID"
MODE="Ad-Hoc"
RATE="auto"
IWPRIV="set_framing 1"
;;

# Old Lucent Wavelan
08:00:0E:*)
INFO="Wavelan example (Lucent default settings)"
NWID="0100"
MODE="Ad-Hoc"
FREQ="2.425G"
KEY="off"
;;

# Netwave (Xircom Netwave/Netwave Airsurfer)
00:80:C7:*)
INFO="Netwave example (Netwave default settings)"
NWID="100"
KEY="00"
;;

# Proxim RangeLan2/Symphony (what is the MAC address ???)
XX:XX:XX:*)
INFO="Proxim RangeLan2/Symphony example"
NWID="0"
MODE="Master"
CHANNEL="15"
IWPRIV="setsubchan 1"
;;

# No Wires Needed Swallow 550 and 1100 setting (what is the MAC address ???)
XX:XX:XX:*)
INFO="NWN Swallow example"
ESSID="session"
KEY="0000-0000-00 open"
;;

# Symbol Spectrum24 setting (what is the MAC address ???)
XX:XX:XX:*)
INFO="Symbol Spectrum24 example"
ESSID="Essid string"
;;

# Generic example (decribe all possible settings)
*)
INFO="Fill with your own settings..."
# ESSID (extended network name) : My Network, any
ESSID=""
# NWID/Domain (cell identifier) : 89AB, 100, off
NWID=""
# Operation mode : Ad-Hoc, Managed, Master, Repeater, Secondary, auto
MODE=""
# Frequency or channel : 1, 2, 3 (channel) ; 2.422G, 2.46G (frequency)
FREQ=""
CHANNEL=""
# Sensitivity (cell size + roaming speed) : 1, 2, 3 ; -70 (dBm)
SENS=""
# Bit rate : auto, 1M, 11M
RATE=""
# Encryption key : 4567-89AB-CD, s:password
KEY=""
# RTS threshold : off, 500
RTS=""
# Fragmentation threshold : off, 1000
FRAG=""
# Other iwconfig parameters : power off, ap 01:23:45:67:89:AB
IWCONFIG=""
# iwspy parameters : + 01:23:45:67:89:AB
IWSPY=""
# iwpriv parameters : set_port 2, set_histo 50 60
IWPRIV=""
;;
esac

MS3FGX 03-31-2007 01:43 AM

What device and driver are you currently using? Not all drivers support scanning, especially when using ndiswrapper.

Quote:

I am unable to see any wireless networks as well although I am currently connected to one (my home network).
This may also be the issue. You cannot scan for networks while already connected to one. Once the card is associated with the AP, that is pretty much all you are going to get.

Try running a command like:

Code:

iwconfig eth0 mode Monitor essid auto ap auto
To make sure you card is in a good state for scanning.

The rc.wireless is not really of any interest, as it just states basic default configurations for cards. It doesn't make any adjustments that you couldn't do with iwconfig on your own.

WOP1337 03-31-2007 03:24 AM

I have a good card with a prism 2 driver along with a good antenna. I do not require ndiswrapper. Just the standard linux prism drivers.
http://wlanparts.com/product/WDNL2511CDPLUSEXT2

I also tried using that command and varations of it as well and it never seems to work.

root@qosmio:~# iwconfig eth0 mode Monitor essid auto ap auto
Error for wireless request "Set Mode" (8B06) :
SET failed on device eth0 ; Invalid argument.


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