I have had some network difficulties the last week, and I don't normally ask around forums, but I feel like this is the last resort.
Now, my problem is that I somehow cannot connect to things like Steam, I can't connect to my local hosted Minecraft server using my IP ('localhost' works fine), my Win-7 gadgets can't connect to their server, and I can't connect to the peers in Bittorrent. My internet works perfectly in the ways of browsing, streaming Youtube, downloading installation files (no problem downloading the setup for Steam, Bittorrent, etc.), and I am even able to connect to Origin just fine. I just don't get the pattern.
I formatted my computer, hoping it would fix the thing but with no luck. I guess it is a router/modem thing. I have made no recent changes in router settings or installed suspicious programs whatsoever, and I have tried a series of things that didn't work, so I don't really know what to do at this point. I sincerely hope you do!
Here are my specs, should they matter:
Windows 7 Home Premium 64-bit
Intel Core i7
4 GB RAM
ADM Radeon HD 6800 series
D-Link Dir-615 router
I really hope you guys can help me with this!