SoftEther VPN Bridge Mode Speed Issue

I’ve noticed that there’s been some speed issues when using SE VPN in a local bridge mode with dnsmasq. I can’t seem to pin this issue to anything specific.

From what I can tell, a simple restart of the vpnserver service and dnsmasq will fix this issue. To run this from command line on Ubuntu, do sudo service vpnserver restart && sudo service dnsmasq restart. If you’re already root, omit sudo.

If anyone knows what might cause this, please post your idea below and we’ll see if we can’t track this down.

An update to this, seems like it may be an issue with more recent builds of the VPN server. On the SE Client, you can disable NAT-T and disable UDP acceleration. This seems to help with speed issues.