Wireless networking issue with Ubuntu
I must say I am really new to the networking stuff and Linux (Ubuntu 8.10). I am unable to connect to my wireless network after running these commands to change the MAC address and run in monitor mode:
airmon-ng stop wlan0
ifconfig wlan0 down
macchanger --mac 00:11:22:33:44:55 wlan0
airmon-ng start wlan0
The reason I did this is because I want to test how secure my wireless network is (first stopping and trying to change the MAC, and then using air-crack-ng).
Here is what I have tried to reconnect to my wireless network:
-
Firstly I think I should change wlan0 to where it was (especially the Mac address) with the following commands:
ifconfig mon0 down ifconfig wlan0 down macchanger --mac 00:0e:9b:ab:56:19 # myoriginalMacAddress airmon-ng stop wlan0 ifconfig wlan0 up -
Secondly I tried to connect to my wireless network in my WICD but it failed at obtaining IP address after going through validating authentication. So I exited WICD and tried to do the same thing in terminal:
$ sudo iwconfig wlan0 essid "mywireless" $ sudo dhclient wlan0 There is already a pid file /var/run/dhclient.pid with pid 23682 killed old client process, removed PID file Internet Systems Consortium DHCP Client V3.1.1 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ mon0: unknown hardware address type 803 wmaster0: unknown hardware address type 801 mon0: unknown hardware address type 803 wmaster0: unknown hardware address type 801 Listening on LPF/wlan0/00:0e:9b:ab:56:19 Sending on LPF/wlan0/00:0e:9b:ab:56:19 Sending on Socket/fallback DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 8 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 13 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 15 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 12 DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 1 No DHCPOFFERS received. No working leases in persistent database - sleeping.
Here is the ifconfig output of my network adapters if it can help:
$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:c0:9f:8d:23:74
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:19 Base address:0x1800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:4457 errors:0 dropped:0 overruns:0 frame:0
TX packets:4457 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:493002 (493.0 KB) TX bytes:493002 (493.0 KB)
wlan0 Link encap:Ethernet HWaddr 00:0e:9b:ab:56:19
UP BROADCAST NOTRAILERS PROMISC ALLMULTI MTU:576 Metric:1
RX packets:1508929 errors:0 dropped:0 overruns:0 frame:0
TX packets:768144 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:806027375 (806.0 MB) TX bytes:78834873 (78.8 MB)
wlan0:avahi Link encap:Ethernet HWaddr 00:0e:9b:ab:56:19
inet addr:169.254.5.92 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST NOTRAILERS PROMISC ALLMULTI MTU:576 Metric:1
wmaster0 Link encap:UNSPEC HWaddr 00-0E-9B-CD-4E-18-00-00-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Does anyone know what my problem is and how to solve it?
Solution 1:
What version of Linux/Unix are you running, because not all commands are the same for wireless?
Command:
$ cat /etc/*-release
And why are you stopping and trying to spoof(change your MAC) before you connect to your wireless AP(access point)or wireless router, instead of just connecting to it?
This should only apply if you are planning to do some wireless pentest/auditing or to see how secure your wireless network router/ap is.
ifconfig mon0 down ifconfig wlan0 down macchanger --mac 00:0e:9b:ab:56:19 # myoriginalMacAddress airmon-ng stop wlan0 ifconfig wlan0 up
The reason you are having issues with you second command or (2) is cause of all the other unnecessary stuff you just did on number 1.