Can I play a rosbag to simulate data originally recorded from a remote ros master? [closed]

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I have data recorded into a bag file on my "local" machine that was generated from a remote ros master. When I issue a rosbag play command on the file (which I checked and is ok), nothing happened. When I issue a rostopic echo <topic> for the data I'm looking for, I get "unable to communicate with master", which is true, I want to be able to work on the data at times when I don't have network access to the robot sensors generating it.

Is this possible? Is it possible some other way to simulate the robot? Do I need to temporarily set ros master to my local machine when I'm doing this? Or is this what Gazebo can be used for? (even though the data in the bag is relatively simple, just xyz positional data?)

Thanks