210 under NAT speedfusion not working

Hi, I can not establish a tunnel between two speedfusion Peplink 210 under NAT. The version for both is 6.1.2 build 1597. I still shot the doors 32015 TCP and UDP 4500 on both the router to the private IP Peplink. As a test, I tried to connect one 210 to another Peplink 380 without nat with a public IP, and the tunnel is established correctly.

Is there any rule to configure the firewall?

Help me! Thanks

fixed with a reboot … never happened :eek: