SoftEther VPN User Forum

We want to use softether as VPN access point to our network.
The setup is as follows:

VPN client
|
internet
|
Softether local bridge
|.2
internal network
192.168.66.0/24
|.1
dhcpserver/sshd


The VPN client connects to the Softether VPN server and will get an ip-address from the dhcp server. The default gateway the client will get is 192.168.66.1/24.

The VPN client is capable to make a ssh/scp connection to the dhcp server and transfer files from the VPN client to the dhcp server. Transferring files the other way around (dhcp server to VPN client) is only possible in case these files are less than 1000 bytes.

The setup works in an VMWare environment but not using real servers.
We already tried several network cards like Broadcom Netxtreme and Intel PRO 1000 but without success.
Unfortunately the specifications for the network cards is not detailed enough.
Is this a hardware problem or is it something else?


Environment:
Slackware 14 64-bit
Broadcom Netxtreme/ Intel PRO 1000
Softether vpnserver v4.06-9433-beta-2014.03.21 linux-x64 64-bit
Windows client v4.06-9433-beta-2014.03.21-windows-x86_x64-intel
No firewalls (all turned off)

Is there any error when send a file from DHCP server to VPN Client?

There are no errors in the logs.
The only message what can be found is that the MTU is changed.
The program I used to transfer the file loses the connection (with a timeout).

Running wireshark to check the packets shows a lot of resent packets.
Run some tests, transferring files from the vpn client to the destination works (small and big files). Transferring files to the vpn client works only for files smaller than approx 1000 bytes. This is almost the size of the MTU (coincidence?).

Did you enable promiscuous mode on VM?

On a VM it is working.

Now we want to set it up on real hardware but somehow we can't get it working.

We suspect the interface card so we tried broadcom and intel but without succes.
Who can tell us which hardware is working, brand and type.

Thanks in advance.

Usually we use Intel PRO/1000 MT、Gigabit CT, PRO/1000 GT.
If problem is MTU, it need confirm VALN Tag setting. You can configure VLAN Tag setting in Local Bridge setting window.
Could you tell me your environment more?
Please see this topic
http://www.vpnusers.com/viewtopic.php?f=7&t=2790

Could you try latest version?
SoftEther VPN 4.09 Build 9451 Beta (June 9, 2014)
http://www.softether.org/5-download/history