Like all linux distros, open a console
tail -f /var/log/messages
Mar 8 22:35:42 linux kernel: SuSE-FW-DROP-DEFAULT IN=ppp0 OUT= MAC= SRC=188.8.131.52 DST=184.108.40.206 LEN=48 TOS=0x00 PREC=0x00 TTL=113 ID=31151 DF PROTO=TCP SPT=3360 DPT=3127 WINDOW=65340 RES=0x00 SYN URGP=0 OPT (020405AC01010402)
If you want a Firewall tool that lets you see hits, I recommend FireStarter (It is also the easist firewall tool I have ever seen). Better tool than the basic one that comes with Suse.