Strongswan
# /etc/ipsec.secrets - strongSwan IPsec secrets file 192.168.0.1 192.168.0.100 : PSK 0sFpZAZqEN6Ti9sqt4ZP5EWcqx 192.168.0.1 192.168.0.200 : PSK 0sjVzONCF02ncsgiSlmIXeqhGN