If you want to open a WSI in a remote host, you need to
install wsiserver in the remote host.
set port forwarding to the host. wsiserver runs on port 31791 by default. If 31791 is occupied by other process, wsi-viewer will try to use 31792, 31793, 31794, 31795.
e.g. If you are opening the WSI in "remoteHostA" which is in your local network and has 192.168.50.10, in ssh config file,