I've installed SoftEther VPN Server on Ubuntu 16.0.4.1
VPN clients: iPhone, Windows 8 and another Ubuntu Server
Network Traffic Speed Test Tool:
without VPN:
- Download - 36.88 Mbps
- Upload - 4.93 Mbps
with VPN (L2TP or SSTP or SoftEteher VPN client with Local Bridge or SecureNAT):
- Download - 300.53 Kbps
- Upload - 4.79 Mbps
from VPN server to another server without VPN (same LAN, 1Gbps):
- Download - 0.95 Gbps
- Upload - 0.92 Gbps
from another server to VPN server via VPN:
- Download - 9.14 Mbps
Upload - 905.33 Mbps
Download -only - 88.18 Mbps
- Upload -only - 0.91 Gbps
Why Download is very low ?