Randomly losing internet connection

So I've had this problem for a while now, and it's starting to get more frusturating. I've tried googling a solution, but with no luck so far. Basically the problem is that I randomly lose internet connection. This is fixed by unplugging the cable from the wireless router to the LAN/TV/phone router, and plugging it back in right after. This happens every 2 hours or so, and it's pretty anyone that I have to replug the cable everytime. And this seems to be a problem with our whole wireless network, every other device in the house also loses connection until i replug the cable.

I've also noticed that it's only websites which get blocked, not the whole internet connection. Most of the time i'm playing online video games, and I don't get disconnected from them, which I find weird.

I also found something weird in the log files from the d-link webpage, I don't know if it has any relevance at all, but i'll post it anyways:
Block WAN PING is enabled.
Jan 12 06:22:22 Remote management is disabled.
Jan 12 06:22:22 Block WAN PING is enabled.
Jan 12 06:22:21 Remote management is disabled.
Jan 12 06:22:21 Block WAN PING is enabled.
Jan 12 06:22:20 Remote management is disabled.
Jan 12 06:22:20 Block WAN PING is enabled.
Jan 12 06:22:20 Remote management is disabled.
Jan 12 06:22:20 Block WAN PING is enabled.
Jan 12 06:22:19 Remote management is disabled.