An SSH server needs a port; you need to expose Docker's SSH port to NNI as the connection port. For example, if you set your container's SSH port as  **``A``** \ , you should map the container's port ** ``A``**  to your remote host machine's other port ** ``B``** \ , NNI will connect port ** ``B``**  as an SSH port, and your host machine will map the connection from port ** ``B``**  to port ** ``A``**  then NNI could connect to your Docker container.
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An SSH server needs a port; you need to expose Docker's SSH port to NNI as the connection port. For example, if you set your container's SSH port as ``A``, you should map the container's port ``A`` to your remote host machine's other port ``B``, NNI will connect port ``B`` as an SSH port, and your host machine will map the connection from port ``B`` to port ``A`` then NNI could connect to your Docker container.