@TARANA POLEKAR What properties you need to set depends on whether you are using RAW or HTTP to transfer data over S2S between your NiFi instances. The S2S properties must be configured on the target NiFi (the one NOT running the RPG). When using RAW or HTTP the initial communications with the target NiFi instance is to the targets's HTTP(s) port. This allows you to setup your dataflow to your S2S. When it comes to data transfer, With the RAW format, data is trying to be transferred to the configured nifi.remote.input.host= at configured nifi.remote.input.socket.port= . With HTTP format, data is transferred to nifi.remote.input.host= at the nodes http(s) port. My guess here is that you are using the default RAW protocol, and you source instances cannot communicate with the nifi.remote.input.port=. Other issue may be if nifi.remote.input.host= is not set, Java tries to determine hostname itself and that my be resolving to localhost causing communications issues, Thanks, Matt ... View more