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<markdown> # pfSense Site to Site VPN
## Topology
## Configuration
### Create Phase 1 Tunnel
1. Navigate to VPN > IPSec and click + Add P1
2. Enter a description
3. Key Exchange Version: IKEv2
4. Interface: WAN
5. Remote Gateway: 172.16.1.10
6. Authentication Method: Mutual PSK
7. Pre-Shared Key: Secret
8. Encryption Algorithm: Alogorithm: AES, Key length: 256 bits, Hash: SHA256, DH Group: 14(2048bit)
9. Life Time: 86400
10. Click Save
### Create Phase 2 Tunnel
1. Click + Add P2
2. Enter a description.
3. Mode: Tunnel IPv4
4. Local Network: Type: MPU5
5. Remote Network: Type: Network, Address: 192.168.1.0/24
6. Protocol: ESP
7. Encryption Algorithms: AES 256 bits
8. Hash Algorithsm: SHA256
9. PFS key group: 14 (2048 bit)
10. Life Time: 1800
11. Automatically ping host: 192.168.1.1 </markdow n>