[Voyage-linux] Bridge Driving Me Bonkers

Mon Nov 21 10:20:46 HKT 2005

Hi Andrew

Just a note about vtun, in the past (last 2 years) I have had trouble
with the vtund dieing.

Cheers
Mike

Andrew Niemantsverdriet wrote:

>Brain,
>
>Have you looked at vtun (http://vtun.sourceforge.net)? I really like
>openVPN but I am leaning towards vtun for our future back hauls simply
>because it is the most efficient VPN solution out there according to
>google and it offers another layer of security to the link. 
>
>But it still does not beat the throughput of a proxy arp'd bridge :)
>
>I am interested to see you notes on openVPN and voyage when you get a
>chance to share them.
>
>
>On Sun, 2005-11-20 at 13:50 -0600, Brian Anderson wrote:
>  
>
>>On the contrary, I think anybody trying to use a client and/or bridge
>>configuration should care about this. Personally, I started down that road
>>and turned back because my googling showed a lot of people having problems
>>getting proxy arp to work properly. That may no longer be true, but I
>>decided to avoid the problem by applying a sledgehammer to the problem. I
>>created an OpenVPN tunnel in bridge mode that bridges the eth0 and a tap0
>>interface on each end. This avoids any bridging problems with the wireless
>>interface in managed mode, because the wireless interfaces are not part of
>>the bridge. Downside of course is slightly less throughput. You may think it
>>to be overkill, but it works just fine. Because it's not IP-centric, I can
>>send anything through the tunnel I care to. The MACs are not proxied; they
>>appear at the other end of the link intact.
>>
>>I have a pair of WRAP boards with Voyage and Ubiquity SR5 5 ghz radios in
>>this configuration that have been humming along for about 3 weeks at 7 mb/s
>>over a 7 mile link.
>>
>>Brian
>>
>>-----Original Message-----
>>From: voyage-linux-bounces+bwanderson=cableone.net at list.voyage.hk
>>[mailto:voyage-linux-bounces+bwanderson=cableone.net at list.voyage.hk] On
>>Behalf Of Andrew Niemantsverdriet
>>Sent: Saturday, November 19, 2005 4:28 PM
>>To: voyage-linux at voyage.hk
>>Subject: Re: [Voyage-linux] Bridge Driving Me Bonkers
>>
>>For all who are following this thread.
>>
>>Punky mailed me off list and pointed me to a site that said wireless
>>bridging would not work. That message was right mostly. When the
>>wireless card is in master mode bridging works great. I have 3 access
>>points working in that mode now. However on the other side when the
>>wireless card is in Managed mode the bridge ceases to function do to the
>>fact that the wireless card does not know where the wired clients are. 
>>
>>With out going into network theory to much there is a solution; proxy
>>arp. There is a program out there called parprouted that does proxy arp
>>for wireless and fits the bill quite nicely. I have tested and confirmed
>>that it works. I have also made a script that makes things a little
>>easier if anybody is interested. Judging from the responce to my first
>>mail on this topic I think what I am doing is pretty unique so maybe
>>nobody else cares.
>>
>>
>>On Thu, 2005-11-17 at 19:40 -0700, Andrew Niemantsverdriet wrote:
>>    
>>
>>>I am trying to make a basic bridge between eth0 and wlan0. When I ssh
>>>into the box I can ping both the Internet at large (wlan0 faces
>>>Internet) and of course the device that I used to ssh in with (connected
>>>to eth0).
>>>
>>>However when I try from the computer sitting behind the wrap to ping the
>>>Internet I can't get through. Seems to be "stuck" at the bridge. Any
>>>suggestions?
>>>
>>>Here is my interfaces file:
>>># Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
>>># /usr/share/doc/ifupdown/examples for more information.
>>>auto lo
>>>iface lo inet loopback
>>>
>>>auto br0
>>>iface br0 inet static
>>>     address 192.168.254.13
>>>     netmask 255.255.255.0
>>>     network 192.168.254.0
>>>     broadcast 192.168.254.255
>>>     gateway 192.168.254.1
>>>     bridge_ports eth0 wlan0
>>>     pre-up ifconfig eth0 0.0.0.0 up
>>>     pre-up ifconfig wlan0 0.0.0.0 up
>>>     pre-up iwconfig wlan0 essid hotspot2 mode managed rate 1M
>>>     #pre-up iwconfig wlan0 123456789012
>>>     pre-up brctl addbr br0
>>>     pre-up brctl addif br0 eth0
>>>     pre-up brctl addif br0 wlan0
>>>     post-down ifconfig eth0 0.0.0.0 down
>>>     post-down ifconfig wlan0 0.0.0.0 down
>>>     post-down brctl delif br0 eth0
>>>     post-down brctl delif br0 wlan0
>>>     post-down brctl delbr br0
>>> 
>>>This interface file works great for AP's (with a few changes). Any help
>>>would be really appreciated.
>>>
>>>
>>>_______________________________________________
>>>Voyage-linux mailing list
>>>Voyage-linux at list.voyage.hk
>>>http://list.voyage.hk/mailman/listinfo/voyage-linux
>>>
>>>      
>>>
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>>    
>>
>
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