Hello Michael,
Am Mittwoch, dem 18.10.2023 um 19:42 +0100 schrieb Michael Tremer:
Hello Erik,
This is interesting, because OpenVPN probably needs some acceleration.
Throughput has always been poor because of the badly implemented fragmentation code, that is as far as I know also deprecated and therefore won’t be improved, but we all depend on it right now.
However, we have only made very bad experiences with out of tree kernel modules. Especially since we now only have two years on the LTS kernels, we need to be able to rely on those maintainers to keep up. I don’t want to say anything bad about them at all, but in the past, even projects that have been moving well suddenly stalled and became a large headache for us.
And there might be an alternative that should be an option for OpenVPN (at least theoretically): KTLS.
Interesting haven´t heared of that before.
I did a quick Google search and could not find anything. But do you know how this module relates to KTLS? Can KTLS not be used in this case?
Will give it also a research but haven´t see a concept for KTLS as a substitution for ovpn-dco or speed acceleration for OpenVPN in general.
Another point is the limitations of ovpn-dco by design since it needs a subnet topology but IPFire uses net30 and to implement this for Roadwarriors we would need to change this which is a bigger task. We spoke about that longer time ago. What would work out of the box are Net-to-Net connections since they use a p2p topology and the speed boost from the diagrams looks good so far --> https://openvpn.net/blog/openvpn-data-channel-offload/ .
Anyways, will research in terms of KTLS for OpenVPN a little more and come then back in here again.
-Michael
Best,
Erik
On 18 Oct 2023, at 10:50, ummeegge ummeegge@ipfire.org wrote:
Hi all, wanted to open a testing scenario for the OpenVPN data channel offload (DCO) --> https://github.com/OpenVPN/openvpn/blob/master/README.dco.md kernel module. So far i have been used this LFS --> https://git.ipfire.org/?p=people/ummeegge/ipfire-2.x.git;a=blob;f=lfs/ovpn-d... but i wanted to ask for a proper or correct way, in special the installation paths of such modules but in general if i can handle it in such way.
Best,
Erik