Securing a wired conncection from local ISP

I'm presently in India and using a broadband cable Internet connection provided by a local ISP - surprisingly they did not provide a modem/router - they just a drew a cable in from a telephone pole near the house - and plugged it into the CPU using an RJ45 Connector. Does anyone know what kind of a connection this is ?

Now, most importantly - I think this connection is unencrypted and anyone could actually climb up that pole, draw some wires and freely steal data. I am unaware of what other security threats are possible on such a connection. Any advice on how to secure such a connection ? Also, does anyone else here have any experience with such a connection ?