VPN connection

I need to make a VPN connection using Strongswan, the remote network is behind a NAT and I have the Encryption Domain assigned to me and the remote, the tunnel has the following properties:

Authentication Method Pre-Shared Key
Encryption Scheme IKE
Diffie-Hellman Group Group 2
Encryption Algorithm 3DES
Hashing Algorithm SHA-1
Lifetime (for renegotiation) 28800s
Aggressive Mode Main Mode

Encapsulation (ESP or AH) ESP
Encryption Algorithm 3DES
Hashing Algorithm SHA-1
Perfect Forward Secrecy No
Lifetime (for renegotiation) 3600s