Hi,

I am having issues getting two cassandra instances to communicate.

 - ListenAddress on each machine to their respective public IP addresses.
 - Seeds has an entry for both public IP addresses.
 - I have opened up iptables for ports 9160, 7000, 7001, 8888 (not sure which ones really need to be opened, so did every port I could see)

Running nodeprobe on 192.168.0.101, looking at it's server ie:
$ cassandra/bin/nodeprobe -host 192.168.0.101 ring
Only shows 192.168.0.101

Running nodeprobe on 192.168.0.101, looking at the second server ie:
$ cassandra/bin/nodeprobe -host 192.168.0.102 ring
Results in the following error

Error connecting to remote JMX agent!
java.io.IOException: Failed to retrieve RMIServer stub: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: Exception creating connection to: 192.168.0.102; nested exception is: 
java.net.NoRouteToHostException: No route to host]
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:342)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:267)
at org.apache.cassandra.tools.NodeProbe.connect(NodeProbe.java:152)
at org.apache.cassandra.tools.NodeProbe.<init>(NodeProbe.java:114)
at org.apache.cassandra.tools.NodeProbe.main(NodeProbe.java:545)
Caused by: javax.naming.CommunicationException [Root exception is java.rmi.ConnectIOException: Exception creating connection to: 192.168.0.102; nested exception is: 
java.net.NoRouteToHostException: No route to host]
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:118)
at com.sun.jndi.toolkit.url.GenericURLContext.lookup(GenericURLContext.java:203)
at javax.naming.InitialContext.lookup(InitialContext.java:409)
at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1902)
at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1871)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:276)
... 4 more
Caused by: java.rmi.ConnectIOException: Exception creating connection to: 192.168.0.102; nested exception is: 
java.net.NoRouteToHostException: No route to host
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:632)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at com.sun.jndi.rmi.registry.RegistryContext.lookup(RegistryContext.java:114)
... 9 more
Caused by: java.net.NoRouteToHostException: No route to host
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:310)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:176)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:163)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
at java.net.Socket.connect(Socket.java:542)
at java.net.Socket.connect(Socket.java:492)
at java.net.Socket.<init>(Socket.java:389)
at java.net.Socket.<init>(Socket.java:203)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 14 more


What have I missed?

Cheers,
Chris