Ray server over internet

I have a problem with connect a client node to the server node
both of them be in the internet and behind the NAT. (not in local network)
I was forwarded port of the ray server on the nat (for example 6379 is default port we used)

when i run the "ray start --address=‘’ --redis-password=‘5241590000000000’ "
an error are occurring as below: (ip address just example of my real ip address)

2021-12-13 19:44:18,772 ERROR gcs_utils.py:136 – Failed to send request to gcs, reconnecting. Error <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = “failed to connect to all addresses”
debug_error_string = “{“created”:”@1639412058.771008400",“description”:“Failed to pick subchannel”,“file”:“src/core/ext/filters/client_channel/client_channel.cc”,“file_line”:3158,“referenced_errors”:[{“created”:"@1639412058.771003900",“description”:“failed to connect to all addresses”,“file”:“src/core/lib/transport/error_utils.cc”,“file_line”:147,“grpc_status”:14}]}"

any body have an idea?