Thank you again. Checked all those. The Win 7 PC configuration is the same as a Linux Mint PC setup (on the same home network) which announces an IP and a 2xxxx Port to use over the internet. TWin 7 PC does give an IP and 2xxxx Port to use over the internet. Checking on ‘Gateway port’ provides a port, but using that port with my known internet IP does not enable/permit connection from a remote PC.