Changes between Version 20 and Version 21 of FeddUsersGuide


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Timestamp:
Jun 10, 2014 11:00:26 AM (10 years ago)
Author:
faber
Comment:

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  • FeddUsersGuide

    v20 v21  
    607607This configuration allows all th enodes in the federated experiment to make outgoing TCP connections into 128.9.0.0/16.  There are actually 2 NATs manipulating packets:
    608608
     609[[Image(NATS.png)]]
     610
     611The inner NAT is converting from the DETERLab private addresses (10.0.0.0/8) into the interface address of the Fedd VM in the VMM private network (192.168.233.0/24, if you are using virtualbox as configured above).  The second NAT converts from the VMM private address space into the desktop's address (on the 128.9.0.0/16 net0.
     612
     613This limits the connectivity that one can provide.  The outer NAT can only convert back into VM addresses for ports that have been exported, as can the fedd VM NAT.  There can be hundreds of nodes in the federated experiment, so complete translation is impractical. The trade-off is between the convenience of using the VM image to avoid the details of the federation setup vs. the connectivity provided.  Much more complete connectivity can be achieved by running the desktop plugin directly on a desktop and avoiding the NATs.