Dear Members,
Using following link, I created an IPsec VPN tunnel which terminates with error given in the snapshot 
https://wiki.ipfire.org/configuration/services/ipsec/example_configuration-_roadwarrior_with_windows
Please help to mitigate the issue, I have password of ISP cisco router (which is present between firewall & Internet) do let me know how I can allow vpn tunnel through the router (or bypass)
My Environment:
Client PC = Windows 10
RED Interface: Has static Public IP (one cable it is Connected to ISP router 0/0/1, router has two redundant fiber links terminating on two separate ports, primary link on 0/0/0 & backup link on 0/0/2.
Green Interface has LAN IP & it is connected to my LAN switch.