A quick reminder to myself how to set up Strongswan. /etc/ipsec.conf conn gr2 left=123.45.67.89 leftauth=psk lefthostaccess=yes right=%any rightsubnet=192.168.1.0/24 rightauth=psk auto=add dpdaction=restart esp=aes128-sha1-modp2048 /etc/ipsec.secrets 123.45.67.89 %any : PSK "QWERTY12345" /etc/strongswan.d/charon/kernel-netlink.conf kernel-netlink { ... mtu = 1422…