SoftEther VPN User Forum

Hi! I am trying to setup a VPN connection between my main Location in A and a branch in an B and one in C, which is currently still offline). The Problem is, that the Connection from B to A is established, but after a couple of seconds to a few minutes it is automatically disconnected. The many reconnection tries cause a DoS attack recognition, so DoSProction has to be switched off.
When the Connection is established I am also not able to successfully ping through the tunnel (I can see that Messages arrive from A to B, but nothing Comes back).

My topology is a layer3 routing: A has 10.1.1.254/255.255.0.0, B has 10.3.1.254/255.255.0.0, and C will have 10.2.1.254/255.255.0.0 (in the future).
In A is the layer 3 Switch with the 3 virtual Interfaces for A, B and C.

The Softether Routers are not the Routers into the Internet (I added a static route to the softether virtual Network Card 10.x.1.254). The Internet Routers are Netgear ReadyNAS: A has a RN314 (x86), B and C a RN102 (arm).

SoftEther Version is
on the x86: 4.12 build 9514 (64 bit)
on the arm: 4.12 build 9514 (32 bit)

Who can support?

Please tell me more information.
What OS do you use?
What software do you install in A or B or C?
Did you create a localbridge?
Do you use SecureNAT?

What OS do you use? The Internet Routers are Netgear ReadyNAS: A has a RN314 (x86), B and C a RN102 (arm). The used Version was 6.2.2
What software do you install in A or B or C?
SoftEther Version is
on the x86: 4.12 build 9514 (64 bit) A
on the arm: 4.12 build 9514 (32 bit) B and C
Did you create a localbridge? Yes, this works for all IP adresses except the local one (Softether on 10.1.1.14 cannot access services running on 10.1.1.14)
Do you use SecureNAT? No!

Please try to check "Disable UDP Acceleration" in "Advanced Settings" of the cascade connection setting.

I tried this, but without any success.
The only successful and stable connection is between 2 ARM based systems (NETGEAR RN102 and RN102). It seems, that the connection between a RN102 (ARM based) and the RN314 (x86 based) causes this problem.

Could you show server log?
Is disconnection interval regular?