Debian11增加VPN功能

以下列出了各种类型的 VPN 在 Debian 里面设置

# [Debian 管理员手册|10.3. 虚拟专用网络](https://www.debian.org/doc/manuals/debian-handbook/sect.virtual-private-network.zh-cn.html)

# 添加 openvpn
sudo apt install openvpn
# 在gnome的设置里添加 openvpn 的支持
sudo apt-get install network-manager-openvpn-gnome

# pptp 支持
sudo apt install pptp-linux 
sudo apt install network-manager-pptp-gnome


# IPsec/L2TP VPN
# https://github.com/hwdsl2/setup-ipsec-vpn/blob/master/docs/clients.md

sudo apt install network-manager-l2tp-gnome

# IKEv2 VPN clients
# https://github.com/hwdsl2/setup-ipsec-vpn/blob/master/docs/ikev2-howto.md

 sudo apt-get install network-manager-strongswan