====== ipsec ======

===== linux GUI client =====

  * https://www.bestvpnz.com/how-to-set-up-l2tp-ipsec-vpn-on-linux-networkmanager-strongswan/

<code bash>
sudo add-apt-repository ppa:raharper/bugfixes
sudo apt-get update

apt install network-manager-strongswan xl2tpd
</code>