Firewall Not Starting On Book

Hi, My firewall is configured and I thought it was starting on boot. I went to http://grc.com/x/ne.dll?rh1ck2l2 (Shields Up) and asked it to probe my machine and it was wide open. Went into Yast2 and had a look; it thought firewall was running. I clicked on Reconfigure and accepted all the settings I had already had in there, hit Reconfigure, and then the probes showed I was protected. How can I make sure it loads at boot? How can I be sure it is running? Thanks in advance, Nick