Zone Alarm gives you pop ups up, too. But not all firewalls do. The one that's built into Windows XP doesn't, which is a real pain. Software just doesn't work, and you're left to guess what's wrong. (I'm not sure if the XP firewall blocks Poser or not, since I've long since disabled it. It really is a firewall for dummies - it comes set to allow certain programs through automatically, while it blocks others automatically.)

But Bip's right - don't block Poser. It will needlessly chew up system resources. Poser will constantly try to connect to the network if you block it. Not just when you start it, but constantly. You're better off setting your firewall to "always allow" Poser to connect. If you do that, Poser will check once, and be done with it. It will free up system resources and should speed things up. Feel free to remove Content Parasite if you don't want Poser connecting to the Internet. I did. :-)