Configure VPN on centOS

I have a CentOS 6.2 64bit ZEN server with 2 IPs. I need to configure a VPN via encryptions domains. This are the requirement of my provider. Authentication Method: Pre-share Encryption Scheme: IKEv2 Diffie-Hellman Group: Group 1 Encryption Algorithm: 3DES Hashing Algorithm: SHA-1 Main or Aggressive Mode: Main Mode Lifetime (for renegotiation): 86400 Encapsulation: ESP Encryption Algorithm ESP: 3DES Authentication Algorithm ESP: None Authentication Algorithm AH: SHA-1 Perfect Forward Secrecy: None Lifetime (for renegotiation): 28800 seconds Lifesize in KB (for renegotiation): 4608000 Kilobytes