Parallel connections between endpoints to increase the bandwidth.

[sincomil]

I found that my VPS provider is set some kind of bandwidth limit per one connection to 10 Mbps. But in the same time I can make parallel connections to increase speed up to 100Mbps(It have been tested with iperf3 , see below). So each new connection gives about +10Mbps and 10 connections makes total speed 95-100Mbps, if I increase number of connections further there is no benefits in total speed, but speed of each connection drops a bit with additional parallel connection.

Here is iperf3 for 20 parallel connections

root@OpenWrt:~# iperf3 -c $VPS_IP -R -l 256k -w 256k -M 1260 -P 20
Connecting to host $VPS_IP, port 5201
Reverse mode, remote host $VPS_IP 7 is sending
[  5] local 100.116.17.197 port 51992 connected to $VPS_IP port 5201
[  7] local 100.116.17.197 port 52002 connected to $VPS_IP port 5201
[  9] local 100.116.17.197 port 52004 connected to $VPS_IP port 5201
....
[ 43]   0.00-10.05  sec  5.88 MBytes  4.91 Mbits/sec    0             sender
[ 43]   0.00-10.00  sec  5.50 MBytes  4.61 Mbits/sec                  receiver
[SUM]   0.00-10.05  sec   120 MBytes   100 Mbits/sec    0             sender
[SUM]   0.00-10.00  sec   110 MBytes  92.7 Mbits/sec                  receiver

iperf Done.

This is with only one connection:

root@OpenWrt:~# iperf3 -c $VPS_IP -R -l 256k -w 256k -M 1260
Connecting to host $VPS_IP, port 5201
Reverse mode, remote host $VPS_IP is sending
[  5] local 100.116.17.197 port 41774 connected to $VPS_IP port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec   768 KBytes  6.28 Mbits/sec
[  5]   1.00-2.00   sec  1.25 MBytes  10.5 Mbits/sec
[  5]   2.00-3.00   sec  1.25 MBytes  10.5 Mbits/sec
[  5]   3.00-4.00   sec  1.00 MBytes  8.39 Mbits/sec
[  5]   4.00-5.00   sec  1.25 MBytes  10.5 Mbits/sec
[  5]   5.00-6.00   sec  1.00 MBytes  8.39 Mbits/sec
[  5]   6.00-7.00   sec  1.00 MBytes  8.39 Mbits/sec
[  5]   7.00-8.00   sec  1.00 MBytes  8.39 Mbits/sec
[  5]   8.00-9.00   sec  1.25 MBytes  10.5 Mbits/sec
[  5]   9.00-10.00  sec  1.25 MBytes  10.5 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.06  sec  11.4 MBytes  9.54 Mbits/sec    9             sender
[  5]   0.00-10.00  sec  11.0 MBytes  9.23 Mbits/sec                  receiver

iperf Done.

I'm using WSTunnel for UDP tunneling of WireGuard traffic. So my idea is to increase WireGuard tunnel speed to possible maximum - 100Mbps, but to achieve this WSTunnel endpoints should use more than one connection to pass WG traffic between them. Is it possible to get more connections in UDP mode?

[erebe]

Hello,

Sadly, it is not possible to do that with wireguard and wstunnel. Wstunnel is going to create a single connection per emitter.

If you want to do that, you need to create multiple wireguard interface/tunnel, and after load balance your connections among all those wstunnel interfaces.

[sincomil]

Do you have any plans to implement multiple connections feature to boost total connection speed? I think this kind of feature is very useful in practical use cases. Because it gives ability to users simplify configuration on OpenWRT routers without complex knowledge about policy routing configuration at the same time makes it possible to improve quality of connection via WireGuard, because WG traffic is very often is used to be encapsulated within WSTunnel