SoftEther VPN 下載速度 verry slow 慢
用SoftEther VPN連接兩個網絡，從A到B下載文件，速度只有3k
終於在網上找到這個解決方案
OK... Finally I have solved this problem. Easy though a little bit imperfect.
The reason is unknown yet but I guess it is because the bridge implementation in Linux version is wrong (the Windows version always runs perfectly). I am not a professional programmer so I cannot debug it.
The solution is:
1. create a "bridge with new tap device" in "local bridge settings" instead of a "bridge with existing physical network adapter". (I use the GUI manager on Windows to manage the Linux server remotely)
2. create a bridge between the tap device and the physical adapter with following shell commands (root):
brctl addbr br0
brctl stp br0 off
brctl addif br0 eth1
brctl addif br0 tap_vpn #（在gui management網橋設置裏設置）
ifconfig br0 up
"eth1" is the aim adapter, which you previously chose when creating a "bridge with new tap device", and "tap_vpn" is the new tap device (use ifconfig to see its name).
3. That‘s all. After this steps my network speed is normal and the CPU load is acceptable for me.
http://www.vpnusers.com/viewtopic.php?t=5465
SoftEther VPN 下載速度 verry slow 慢