Ubuntu – SoftEther VPN has very slow download, while upload is high

softetherUbuntuvpn

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 -only88.18 Mbps

  • Upload -only0.91 Gbps

Why Download is very low ?

Best Answer

There was a problem with Local Bridge (eth0), so I changed it to Local Bridge(tap) + br0(tap + eth0) => issue is fixed