Security Log Question

[James A. Coulter]

Checked /var/log/security this morning and found these entries:

Aug  4 09:00:45 sara /kernel: ipfw: limit 10 reached on entry 500
Aug  5 07:45:38 sara /kernel: drop session, too many entries
Aug  5 17:54:32 sara /kernel: drop session, too many entries
Aug  5 17:55:55 sara last message repeated 9 times
Aug  6 01:56:44 sara /kernel: drop session, too many entries
Aug  6 16:40:05 sara /kernel: drop session, too many entries
Aug  7 13:25:23 sara /kernel: drop session, too many entries
Aug  7 15:32:00 sara /kernel: drop session, too many entries
Aug  7 15:32:03 sara last message repeated 3 times

Can someone please tell this newbie if this something to be concerned about?

Many thanks in advance!

Jim C.