Dump module should handle connections which don't allow for remote connectivity

[AvishaiEZen]

1. The ability to perform dumps using PowerPWN depends on the found connections also actually allowing remote connectivity.
2. This means that there could be cases in which connections are found but performing a dump on them will be unavailable since they aren't accessible.
3. We need to verify that the dump is working successfully in such cases and handling these cases gracefully.