I tried to to host bitcoin core json-rpc to listen other than localhost but it would not work even i set it to listen to ip 0.0.0.0

My config (for bitcoin.conf)

testnet=1
server=1
daemon=1
listen=1
rpcuser=something
rpcpassword=secret
rpcport=8332
rpcconnect=0.0.0.0

So how do i make it so that it will listen to ip other than localhost or 127.0.0.1?

I tried to to host bitcoin core json-rpc to listen other than localhost but it would not work even i set it to listen to ip 0.0.0.0

My config (for bitcoin.conf)

testnet=1
server=1
daemon=1
listen=1
rpcuser=something
rpcpassword=secret
rpcport=8332
rpcconnect=0.0.0.0

So how do i make it so that it will listen to ip other than localhost or 127.0.0.1?

VPS informations:

Ubuntu 16.04

Latest Core (just installed it today)

client is remote