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Re: [Openvpn-users] Tunnel Traffic not passing during route-up script execution


  • Subject: Re: [Openvpn-users] Tunnel Traffic not passing during route-up script execution
  • From: Mark Wiater <mwiater@xxxxxxxxxxxxxx>
  • Date: Tue, 04 Jan 2005 16:43:03 -0500

On Tue, 2005-01-04 at 16:16 -0500, Mark Wiater wrote:
> On Tue, 2005-01-04 at 21:51 +0100, Mathias Sundman wrote:
> > On Tue, 4 Jan 2005, Mark Wiater wrote:
> > 
> > > Hello,
> > >
> > > I've got a little problem with a site to site OpenVpn configuration. The
> > > short of it is that I'm trying to measure bandwidth through the tunnel
> > > so I can implement dynamic bandwidth shaping, but traffic generated to
> > > measure the bandwidth never gets into the tunnel.
> > 
> > That's the way it is :-)
> > 
> > You have to call a second script from your route-up script and immediatly 
> > return control to OpenVPN.
> > 
> > OpenVPN will not process any packets until the route-up script has 
> > finished.
> > 
> 
> Thanks Mathias. All better.
> 
> Now that you mention it, it occurs to me that I've heard this discussed
> before but I can't find a reference to it for the life of me.
> 
> Thanks again.


I hate to respond to my own post, but I seem to have another issue. My
client configuration has 'passtos' yet the tunnel packets don't retain
the same value.

16:32:36.914566 client.machine.49300 > server.1024: udp 113 [tos 0x88]
(ttl 63, id 23378, len 141)
16:32:36.945418 server.1024 > client.machine.49300: [no cksum] udp 100
(ttl 97, id 45027, len 128)

16:32:36.915291 client.tunnel.endpoint.1194 >
server.tunnel.endpoint.1194: udp 181 (DF) (ttl 64, id 16382, len 209)

16:32:36.944770 server.tunnel.endpoint.1194 >
client.tunnel.endpoint.1194: udp 165 (ttl 117, id 31811, len 193)

Have I done something else wrong?

mark




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