My experience of Windows 10 is fairly limited, consider checking the built in firewall, IIRC even the Microsoft one can block ports on a per executable basis. What works for telnet (did you get a firewall prompt when connecting? Or run it as Administrator?) may not work for something else.

In reply to Re: Running a packaged script using MozRepl by marto
in thread Running a packaged script using MozRepl by frazap

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