TunnelCat is a free VPN client that helps you bypass internet censorship. This can tunnel your data through DNS SSL and HTTP tunneling powered by OpenVPN.

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Online TunnelCat Payload Generator (this generates .tcat file):
https://tunnelcat.lfasmpao.me/app/generator

Important Information:
The DNS tunneling method is too slow (1mbit based on tests).
If you want faster speed you can switch to another tunneling method.