Entrar al directorio# cd /etc/sysconfig/network-scripts# ls

Crear ifconfig-ipsec# vi ifconfig-ipsec

DST= ip remotoTYPE= ipsecOnboot= yesIKE_METHOD= PSK

Generar clave

Crear ifconfig-ipsec#vi keys-ipsec

IKE_PSK=clave

Subimos el servicio# ifup ipsec