Two RJ45 jacks on one Cat5 cable, proper termination?

Hi,
I've connected two keystone/rj45 jacks to a cable that's plugged into a LAN port on a router, like this:
Router-----Jack1------Jack2.

If I connect my pc to Jack2, it works, i.e. I get a connection with the router, but if I use Jack1 it does not work, i.e. the computer and the router show that nothing is connected to their LAN ports.

I've done some searching and if I understand correctly the problem is most likely that the cable going to Jack2 inserts noise/reflections in the whole length of the transition line (Router to Jack2) because it's not terminated with resistors. Would I need to terminate the TX (orange pair) and RX (green pair) wires with 50 Ohm resistors to ground? Through a 0,1uF cap?

thanks