Setup Site-to-Site VPN Connection

Greetings,

I am trying to setup a site-to-site VPN connection and followed the guides from Sophos. But, it keep failing. First, I have created an IPSec policy using the following configurations:

IKEv2 (Phase 1)
Key Negotiation Encryption Algorithm                    AES-256
Hashing Algorithm                                                  HMAC-SHA-512
Diffie-Hellman group                                              GR14 (2048-bit) or GR20 (384-bit EC)
Negotiation Mode                                                   Main
Lifetime Measurement                                           86400 seconds
IKE Compression                                                   Disabled
Vendor ID                                                               Disabled
Dead Peer Detection (DPD) / IKE Keepalive         Disabled

IPSec (Phase 2)
Transform Encryption + Data Integrity                   esp
Encryption Algorithm                                              AES-256
Data Integrity Hashing Algorithm                           HMAC-SHA-512
Perfect Forward Secrecy (PFS)                             Enabled (GR20)
Encapsulation Mode                                              Tunnel
Lifetime Measurement                                           7200 second

My policy as following:

To be more clear, the remote site information:

And my site information:

The IP 41.202.232.XXX is a public IP for my host who is going to use that IPSec connection. So, I had configured the IPSec connection as following:

Where:

1. Local subnet is the local IP address of my host.
2. Remote subnet which is 194.117.106.128/30
3. And I am doing NATing from the local host IP address to 41.202.232.XXX