What OS is running SSS, and what OS is browser running in?
From the log you posted it looks like the only thing 'wrong' is that you do not have IPV6 running, which is fine, nothing is wrong.
Also error when trying to connect website (fahlserver.ddns.net) is online but isnt responding to connection attempts
the remote computer isnt responding to connections on port 80 possibly due to firewall or security policy settings or because it might be temperorarily unavailable. windows ciouldnt find any problems with the firewall on your computer
where are you seeing this?