GUIminer - Do ports need to be open?

[Kenneth]

I have an Intel Core i7 processor. I've been trying to mine with GUIminer, but had no luck. I've just been mining at BitcoinPlus through Java, but I don't know how efficient this is in comparison.

So my question is, does mining for bitcoins require port-forwarding?

[swissmate]

Don't mine with a cpu, it won't get you anywhere.

And usually windows asks you to let guiminer to send/recieve data from the internet.
If that window doesn't pop out you can set that manually in the firewall options.