Hello,
Thank you for reaching out. Sighthound has no influence on your systems remote access. Can you try checking to see if your port is open using the tool below:
https://www.yougetsignal.com/tools/open-ports/Can you also make sure that the IP of the machine that is running Sighthound has not changed? If both of those things look good, can you please click Help > Report a Problem from within Sighthound? This will send us your logs which will help us investigate this issue.
I will be standing by for your reply, thank you!
Regards,
-Kevin