vyos@DATACENTER:~$ sh configuration
interfaces {
    ethernet eth0 {
        duplex auto
        smp_affinity auto
        speed auto
    }
    ethernet eth1 {
        duplex auto
        smp_affinity auto
        speed auto
    }
    ethernet eth2 {
        address LANIP/26
        duplex auto
        smp_affinity auto
        speed auto
    }
    ethernet eth3 {
        address 172.16.100.77/24
        duplex auto
        smp_affinity auto
        speed auto
    }
    tunnel tun0 {
        address 172.16.200.2/24
        encapsulation gre
        local-ip LANIP
        remote-ip WANIP
}
system {
    config-management {
        commit-revisions 20
    }
    console {
    }
    host-name DATACENTER
    login {
        user vyos {
            authentication {
                encrypted-password ****************
            }
            level admin
        }
    }
    ntp {
        server 172.16.100.1 {
        }
    }
    package {
        auto-sync 1
        repository community {
            components main
            distribution hydrogen
            password ****************
            url http://packages.vyos.net/vyos
            username ""
        }
    }
    syslog {
        global {
            facility all {
                level notice
            }
            facility protocols {
                level debug
            }
        }
        host 172.16.100.60 {
            facility all {
                level debug
            }
        }
    }
}
vpn {
    ipsec {
        esp-group foo {
            proposal 1 {
            }
        }
        ike-group foo {
            proposal 1 {
            }
        }
        ipsec-interfaces {
            interface eth2
        }
        site-to-site {
            peer WANIP {
                authentication {
                    pre-shared-secret ****************
                }
                ike-group foo
                local-address LANIP
                tunnel 1 {
                    esp-group foo
                    local {
                        prefix 172.16.100.0/24
                    }
                    remote {
                        prefix 172.16.103.0/24
                    }
                }
            }
        }
    }
}