3.2. Securing JTAG Communication with a Reverse SSH Tunnel
Use a reverse SSH tunnel (also known as SSH remote port forwarding) to encrypt communication between the Intel® Quartus® Prime JTAG Server on the local machine and JTAG clients such as the Intel® Quartus® Prime Programmer on the remote machine.
These instructions assume that the FPGA board is attached to the local machine. If you have the FPGA board attached to the remote machine, refer to Securing JTAG Communication with an SSH Tunnel.
Before you establish a reverse SSH tunnel for JTAG communications, ensure that you have completed the prerequisites in Securing JTAG Communication with SSH.
To establish a reverse SSH tunnel for secure JTAG communication:
After you have finished using your JTAG client applications, you can close the SSH tunnel in one of the following ways:
- Running the exit command in the terminal or command prompt window where you started the SSH client on the local machine.
- Terminate or close the terminal or command prompt window where you started the SSH client on the local machine.
You can confirm that the SSH tunnel is closed by running the jtagconfig command as follows:
- On the local machine, the jtagconfig command lists only local JTAG connections.
- On the remote machine, the jtagconfig command returns a No JTAG hardware available message.
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