# server - PSK plus certificates
-j
-l PSK-CHACHA20-POLY1305

# client- standard PSK
-s
-l PSK-CHACHA20-POLY1305

# server
-j
-l ECDHE-PSK-AES128-GCM-SHA256

# client
-s
-l ECDHE-PSK-AES128-GCM-SHA256