What ports need to be opened to play multiplayer reliably?

Question

So I'm trying to configure my firewall to open the right ports needed to play multiplayer.

According to Ubisoft's Support page:

...you will need to configure your router or firewall to allow the following 
network ports for the best possible connection:ACR Ports:
UDP: 21200, 7959, 3074Uplay Launcher:
TCP: 80, 443, 13000, 13005, 13200Achievements
UDP & TCP: 14001

But it isn't clear in what direction and which applications need the ports.

I allowed all outgoing and those incoming UDP ports for ACR but I'm still getting BAD upload and STRICT NAT classification.

I temporarily enabled DMZ on my firewall and inspecting my connections when refreshing my online status, I'm seeing these requests for multiplayer:

0.0.0.0:54466 -> 127.0.0.1:45301 (UDP)
localhost:21200 -> 216.98.51.139:28783 (UDP) //ubisoft servers
localhost:21200 -> 216.98.51.140:28783 (UDP)

And these active connections:

localhost:12001 -> 216.240.146.139:12001 (UDP)
localhost:3074 -> 216.240.146.139:12001 (UDP)
localhost:3074 -> 216.240.146.139:12011 (UDP)

(nothing is coming in or out from UPlay at this point)

I want to hold off on playing until I can get the right ports set up so I won't have to worry about it later. AFAIK, I'm going to have to open something incoming if I want to/end up playing as host but I don't know what yet. No chance of dedicated servers here.

What am I missing here? Do I even need to open any incoming ports?

Answer

Well for any help to be gained from this you need to specify your PC specs, what modem, and what router you are using. Also are you the sole owner of the network your using? Do you use a static IP or is it auto generated? Also how many other PC's share the network and do they use static or auto generated IP addresses?

Basic troubleshooting: Reset router and firewall settings to factory then try to connect to the games you would like to use. Power off the modem for a few minutes then plug it back in. Get all the latest Firmware updates for Modem/routers.

Sorry I can't do much more for you without some more info on your end.

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