No Incoming data on One Side of IPSec VPN Tunnel

[simonleung]

I have created an IPsec tunnel between two fortigate firewalls. On the first fortigate firewall, there is both incoming data and outgoing data(see attached photo 1.png). On the second fortigate firewall, there is outgoing data, but not incoming data(see attached photo 2.png). The IPSec VPN Tunnel is up on both fortigate firewalls. I have checked the match logs on both fortigate firewalls, but have not found errors. How do I solve the problem?

1.png

1.png

2.png

2.png

[AEK]

Can you disable npu offload and try again?

config vpn ipsec phase1-interface
  edit phase-1-name
    set npu-offload disable
  end
end

[simonleung]

I have tried disabling and enabling npu offoad, but it has not solved the problem.