The short answer is no
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In which case, an obvious suggestion is: you might try putting the windows machine in the DMZ.
While I don't know the full details of 6in4, I'm not sure how well it will work through the NAT firewall.
You might try seeing if you can configure the tunnel directly on the TP Link router.
you might try putting your 112.xxx.xxx.xxx address in the localaddress= value. [guessing]