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Basic-Master

Member

Registered: 2007-10-30

Posts: 21

Bridging ethernet to wireless

Hello,
I've been trying to bridge my ethernet connection (eth0) to my wireless one (eth1) but haven't managed to get everything working yet. I believe the bridge works when I play a bit with brctl (bridge-utils) but whenever I create a new bridge, I can't connect to my access point any more. How can this be solved? Thanks!

Basic-Master

Member

Registered: 2007-10-30

Posts: 21

Re: Bridging ethernet to wireless

Okay, I managed to get this done with iptables.  The trick was to use a different subnet for the ethernet connection, this is what my current interfaces look like:

eth0      Link encap:Ethernet  HWaddr 00:00:39:D6:12:9E 
          inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
          inet6 addr: fe80::200:39ff:fed6:129e/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:881 errors:0 dropped:0 overruns:0 frame:0
          TX packets:729 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:81226 (79.3 Kb)  TX bytes:149950 (146.4 Kb)

eth1      Link encap:Ethernet  HWaddr 00:16:41:0C:D7:B8 
          inet addr:192.168.1.6  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::216:41ff:fe0c:d7b8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2121 errors:0 dropped:108 overruns:0 frame:0
          TX packets:2259 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:681360 (665.3 Kb)  TX bytes:173635 (169.5 Kb)
          Interrupt:11 Base address:0x8000

where eth0 is my ethernet and eth1 my wireless interface. I found this script on Google and altered it a bit, now it's working

ptables --flush
iptables --table nat --flush
iptables --delete-chain
iptables --table nat --delete-chain
iptables --table nat --append POSTROUTING --out-interface eth1 -j MASQUERADE
iptables --append FORWARD --in-interface eth0 -j ACCEPT
echo 1 > /proc/sys/net/ipv4/ip_forward

Hope this helps someone.