I am trying the below and they don't work for me :
ethminer --farm-recheck 200 -G -F eu1.ethermine.org:4444/0x<Your_Ethereum_Address>.<RigName>
ethminer --farm-recheck 200 -G -F eu1.ethpool.org:3333/0x<Your_Ethereum_Address>.<RigName>
And I am getting JSON RPC Error - Probably cannot connect
Why is that? Also what is the -S argument ( something about Stratum ?? what is that?) This doesn't work as well.