[clug-talk] networking question

[Gustin Johnson]

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Robert Lewko wrote:
<snip>
> I get a VPN established.  If I create the VPN on my home Shaw network
> then I get all the routes that the VPN normally creates,  If I use the
> Aircard, then I should have a route like "nn.nn.nn.nn via 192.168.1.1
> dev ath0", but the VPN does not create that route.  Secondly, when I
> do the iperf test the vpn collapses after the first part of the test
> is done, the return performance test never completes.

Well the device should be something like ppp0, ath0 is your wifi device.
 ppp is point to point so the routing table will look a little different.

Run openvpn from a command line.  Errors are dumped to the console.

> and it hangs forever.

I have seen this when testing asynchronous connections.  What I do is
run a server at each end and then manually test each direction separately.

I also create random binary files like so:
dd if=/dev/urandom of=/path/to/somefile.bin count=20480 bs=1024

This creates a 21 Megabyte file that does not compress well.  I then
transfer this file over a couple of protocols.  Usually I use "rsync -v
- --progress --stats --rsh="ssh -c blowfish" /path/to/somefile.bin
user at some.ssh.host:/destination/path"

This gives me a good idea how a particular link performs in a realistic
setting.

Through all of this I also monitor latency via mtr.

> 
> I am using Kubuntu 8.04 and I have tried Kubuntu 8.10.  I have also
> tried killing KNetworkManager 'cause I have heard that it interferes
> with the server's "push" routes.  I have also turned
> off window_scaling.  I am going to try Debian Lenny.
> 
I am not a fan of network manager.  I guess it makes your normal
person's life easier, especially setting up a WPA wifi connection.  For
me I still "sudo ifup eth0", I also have the syntax for wpa_supplicant
burned into my head.

Let me how you make out.
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