I have to change my config with that:

rpcuser=flappy
rpcpassword=mario
daemon=1
server=1
listen=1
rpcport=11555

addnode=5.9.72.56
addnode=80.112.144.84
addnode=173.244.96.68
addnode=101.167.54.114
addnode=23.251.65.46
addnode=192.241.215.76