SoftEther VPN User Forum

Hi

I have a Softether VPN server running on my PC which is connected to my router. VPN hub is bridged to my LAN. So when I connect to my vpn server I expect the router to hand out IP to the client but it doesn't.

I can assign an IP manually that is part of the network and I'm able to ping my router and other devices in LAN. So there is not a problem with bridging.

When I sniffed the Virtual Adapter I noticed that DHCP offers were actually made by the router but they were considered as error.

Any Help would be appreciated

Could you show captured result?

Same issue here. I had everything working for a long time with a Linksys home router acting as my DHCP server. Now I have switched to a Belkin AC750 router as my DHCP and softether will no longer accept the address for VPN clients. Similar to the OP, I actually see the proper DHCP requests and reply in tcpdump

root@raspberrypi:/home/cmulk# tcpdump port 67 or port 68
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes

09:24:28.582920 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:c8 (oui Unknown), length 277

09:24:28.584432 IP 192.168.3.1.bootps > 192.168.3.104.bootpc: BOOTP/DHCP, Reply, length 548

09:24:28.841347 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:c9 (oui Unknown), length 283

09:24:28.842659 IP 192.168.3.1.bootps > 192.168.3.106.bootpc: BOOTP/DHCP, Reply, length 548

09:24:28.843998 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:ca (oui Unknown), length 283

09:24:28.845372 IP 192.168.3.1.bootps > 192.168.3.110.bootpc: BOOTP/DHCP, Reply, length 548

09:24:29.102263 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb (oui Unknown), length 283

09:24:30.419249 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb (oui Unknown), length 283

09:24:30.851723 IP 192.168.3.1.bootps > 192.168.3.113.bootpc: BOOTP/DHCP, Reply, length 548

09:24:30.852735 IP 192.168.3.1.bootps > 192.168.3.113.bootpc: BOOTP/DHCP, Reply, length 548

09:24:30.853428 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb
(oui Unknown), length 289
09:24:30.854743 IP 192.168.3.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 548
09:24:32.424341 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb (oui Unknown), length 289
09:24:32.425793 IP 192.168.3.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 548
09:24:33.998420 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb (oui Unknown), length 289
09:24:33.999854 IP 192.168.3.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 548
09:24:35.571153 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:cb (oui Unknown), length 289
09:24:35.572642 IP 192.168.3.1.bootps > 255.255.255.255.bootpc: BOOTP/DHCP, Reply, length 548
09:24:35.862424 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from ca:d2:4c:db:5c:c8 (oui Unknown), length 269

Could you show the packet log of SoftEther server and verbose output of the tcpdump?

Attached the requested logs here. Just seems like the belkin DHCP does something that Softether doesn't like

In the meantime, I've figured out a workaround based on other forum posts by using two virtual hubs - one to bridge to the real network and one to provide DHCP in a specified range (but without NAT). I'll post a write up on that since it has been working well.

Edit:
See workaround here: https://sites.google.com/view/softether-dhcp-bridge
Actually, the idea came from you!: http://www.vpnusers.com/viewtopic.php?f=7&t=5396#p14599