[Voyage-linux] Bridge Driving Me Bonkers

[Andrew Niemantsverdriet]

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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