SuSEFirewall on by default?

I saw that SuSEFirewall2 was installed, but how do I know whether it is turned on or not? I as because I'm having some very odd wireless networking issues. I recently installed a mini-pci Cisco Aironet into my Thinkpad R40 using Fabrice Bellet's great airo_mpi driver. The card is working and it sees my AP (it reports its MAC address), but there's no internet connection. Thanks, Mike