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We are migrating 100s of gigs of data from in house server to external server. We tried a lot but still those two servers can't talk to each other, probably due to corporate security. The current setup is like this:

                  |-----> CentOS (T) [Target]
Win10 (A)  ------>|
                  |-----> Ubuntu Jumpbox (U) ----> Ubuntu (S) [Source] 

S cannot talk to T directly.

I am trying to move data via tunnel through Win10 jumpbox which can access both servers.
S--> U --> A ---> T

Is there anyway this can be done? Can we reverse tunnel to Windows host from linux? My backup plan it to just sftp files on A and upload them to T which will just double the downtime during file migrations.


Edit: Backup plan failed short of expectation. Linux filenames having special characters and case senstive duplicate file names are not transferring to windows.

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    The most sane solution would be to get a Change Request through the process that allows SSH (and hence rsync) from your internal system to the external one. – roaima Jun 15 '17 at 7:10
  • Installing a small linux distro alongside win10 is another way to do it, but I second @roaima, ask for the restrictions to be removed – Bruno9779 Jun 15 '17 at 8:43
  • Linux distro is an option. I am trying reverse tunnel with plink/putty, but no success so far. – SarkarG Jun 15 '17 at 9:06
  • There is a program called stunnel which also runs on windows (using openssl). This can act as tunnel client and server; combining both in your windows machine might be a possible solution. – ridgy Jun 15 '17 at 11:11
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I don't know if correct scp version is available in MinGW but you can use -3 option :

man scp

[...]

-3 Copies between two remote hosts are transferred through the local host. Without this option the data is copied directly between the two remote hosts. Note that this option disables the progress meter.

[...]

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