Re: [Openvpn-users] QoS in OpenVPN 2.0

[James Y. <ji...@yo...>]

On Sun, 27 Mar 2005, Florin Andrei wrote:

> On Sun, 2005-03-27 at 20:00 -0800, Ross MacGillivray wrote:
> > Are there any plans to add Quality of Service (QoS) features, i.e.
> > traffic prioritization. 
> >  
> > I've been pulling a little music over OpenVPN, and QoS would be a
> > useful feature to prioritize streaming
> > media over an OpenVPN tunnel.
> 
> Prioritizing the VPN packets when compared to other traffic, or
> prioritize traffic inside the tunnel?
> 
> Anyway, i have a feeling that both can be achieved with other means. In
> order to prioritize the tunnel itself versus other traffic, this is what
> i do:
> 
> # iptables -L -n -v -t mangle | grep 5000
>     0     0 TOS        udp  --  *      *       0.0.0.0/0
> 0.0.0.0/0           udp spt:5000 TOS set 0x10
> 
> Or in other words:
> 
> -A PREROUTING -t mangle -p udp -m udp --sport 5000 -j TOS --set-tos 0x10
> 
> Probably something similar can be applied inside the tunnel, but i never
> tried that. If you do, please post the results.

OpenVPN on Linux has the --passtos option which allows TOS bits in the 
tunnel packets to be applied to the VPN carrier socket..

James