curl https://mirrors.aliyun.com/repo/Centos-7.repo >/etc/yum.repos.d/CentOS-Base.repo
 yum -y install wget epel-release
  yum install -y xl2tpd ppp NetworkManager-l2tp

nmcli connection add type vpn vpn-type l2tp \
con-name "ITShine-VPN" \
ifname itshine-vpn \
vpn.data "gateway=in.itshine.cn, user=yanfeng, password=111, ipsec-enabled=no"




 37  nmcli connection add type vpn vpn-type l2tp ifname itshine-vpn con-name "ITShine-VPN" vpn.data 'gateway=in.itshine.cn, user=yanfeng password-flags=1, ipsec-enabled=no'
   38  nmcli connection modify "ITShine-VPN" vpn.secrets '111'


nmcli connection up "ITShine-VPN" --ask


nmcli connection modify "ITShine-VPN" \
    connection.autoconnect-slaves 1 \
    connection.autoconnect-delay 10  # 断开后10秒重连
    默认就支持重新连
nmcli connection modify "ITShine-VPN" \
    connection.autoconnect yes \
    connection.autoconnect-retries 0  # 0表示无限重试




`