[Madwifi-users] Setting up a bridge for wifi interface
Status: Beta
Brought to you by:
otaku
Menu
▾
▴
[Madwifi-users] Setting up a bridge for wifi interface
|
From: Dmitry K. <dm...@ma...> - 2008-11-23 11:38:59
|
Dear MadWifi users!
I try to setup a bridged interface between eth1 and wlan0. I know, that
maybe it's general setup problem, but I was not able to solve it myself.
The problem is that after joining two interface into a bridge, DHCP
packets do not go from wlan0 to eth1 interface, so the WiFi client
cannot join the network. My general configuration is:
<WLAN ADSL router, DHCP server>
|
v
(eth1)
<Linux box, Debian>
(wlan0)
|
v
<Windows box>
I have setup the bridge as usual:
=== cat /etc/network/interfaces: ===
auto wlan0
iface wlan0 inet manual
pre-up iwpriv wlan0 authmode 2
wireless-essid myserver
wireless-key s:somepassword
auto br0
iface br0 inet dhcp
bridge_ports eth1 wlan0
=== end ===
The Access Point interface is autocreated:
=== cat /etc/modprobe.d/madwifi: ===
options ath_pci autocreate=ap
blacklist ath5k
=== end ===
I have enabled ip forwarding in /etc/sysctl.conf:
=== start ===
/proc/sys/net# cat ./ipv4/ip_forward ./ipv4/conf/default/forwarding ./ipv4/conf/br0/forwarding ./ipv4/conf/eth1/forwarding ./ipv4/conf/wlan0/forwarding
1
1
1
1
1
=== end ===
The bridge br0 gets the IP address automatically during the startup with
no problems. I can also get the IP address for interface eth1:
=== start ===
# dhclient eth1
wifi0: unknown hardware address type 801
wifi0: unknown hardware address type 801
Listening on LPF/eth1/00:01:80:66:5c:68
Sending on LPF/eth1/00:01:80:66:5c:68
Sending on Socket/fallback
DHCPREQUEST on eth1 to 255.255.255.255 port 67
DHCPACK from 192.168.1.1
bound to 192.168.1.11 -- renewal in 272309 seconds.
# tcpdump -i eth1 -n | egrep 'BOOTP/DHCP|ICMP'
12:23:04.003282 IP 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:01:80:66:5c:68, length 300
12:23:04.008202 IP 192.168.1.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 300
=== end ===
Now I want to get the IP address for wlan0:
=== start ===
# dhclient wlan0
wifi0: unknown hardware address type 801
wifi0: unknown hardware address type 801
Listening on LPF/wlan0/06:c0:a8:d2:8b:ed
Sending on LPF/wlan0/06:c0:a8:d2:8b:ed
Sending on Socket/fallback
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on wlan0 to 255.255.255.255 port 67 interval 6
=== end ===
and it fails. ping also does not work:
=== start ===
centurion:/proc/sys/net# ping -I wlan0 mail.ru
PING mail.ru (194.67.57.126) from 192.168.1.10 wlan0: 56(84) bytes of data.
>From centurion.local (192.168.1.10) icmp_seq=1 Destination Host Unreachable
>From centurion.local (192.168.1.10) icmp_seq=2 Destination Host Unreachable
>From centurion.local (192.168.1.10) icmp_seq=3 Destination Host Unreachable
=== end ===
I have run the same steps with setting both interfaces into promiscuous
mode:
=== start ===
# ifconfig eth1 up promisc
# ifconfig wlan0 up promisc
# dhclient wlan0
=== end ===
no positive result. I also tried to load the module with
"autocreate=none" and then perform all steps to create the bridge and
tune the wlan0 interface from the command line -- no success.
I someone can help me, that will be very appreciated!
Thank you a lot in advance!
=== additional information ===
# iwconfig wlan0
wlan0 IEEE 802.11g ESSID:"centurion" Nickname:""
Mode:Master Frequency:2.437 GHz Access Point: 00:C0:A8:D2:8B:ED
Bit Rate:0 kb/s Tx-Power:17 dBm Sensitivity=1/1
Retry:off RTS thr:off Fragment thr:off
Encryption key:XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XX Security mode:restricted
Power Management:off
Link Quality=0/70 Signal level=-96 dBm Noise level=-96 dBm
Rx invalid nwid:4336 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
# ifconfig -a
br0 Link encap:Ethernet HWaddr 00:01:80:66:5c:68
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::201:80ff:fe66:5c68/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1763604 errors:0 dropped:0 overruns:0 frame:0
TX packets:2207324 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:129239429 (123.2 MiB) TX bytes:2147801672 (2.0 GiB)
wlan0 Link encap:Ethernet HWaddr 06:c0:a8:d2:8b:ed
inet6 addr: fe80::4c0:a8ff:fed2:8bed/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:2101 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:260772 (254.6 KiB)
eth1 Link encap:Ethernet HWaddr 00:01:80:66:5c:68
inet6 addr: fe80::201:80ff:fe66:5c68/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:1763621 errors:0 dropped:0 overruns:0 frame:0
TX packets:2235459 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:156157312 (148.9 MiB) TX bytes:2149673495 (2.0 GiB)
Memory:fdde0000-fde00000
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:275409 errors:0 dropped:0 overruns:0 frame:0
TX packets:275409 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:17237491 (16.4 MiB) TX bytes:17237491 (16.4 MiB)
wifi0 Link encap:UNSPEC HWaddr 00-C0-A8-D2-8B-ED-65-74-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:298 errors:0 dropped:0 overruns:0 frame:64
TX packets:2280 errors:24 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:280
RX bytes:19519 (19.0 KiB) TX bytes:344458 (336.3 KiB)
Interrupt:16
# ip route ls
192.168.1.0/24 dev br0 proto kernel scope link src 192.168.1.10
default via 192.168.1.1 dev br0
# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.000180665c68 no eth1
wlan0
=== end ===
|