checkpoint firewall - efficiency drive

Hello All

we run a 2 node cluster of checkpoint firewall with a number of remote sites coming up to us over a MPLS network presented to us on a Cisco router

this Cisco router is connected to a dedicated interface on the firewall

we are ultimately looking to reduce the amount of spurious traffic that comes up this link and hots the firewall only to be discarded

we have a process to switch the firewall log file at 23.59 every work day

doing some quick and dirty analysis on the fw logs we seem to be seeing approx 15 - 20 percent of log entries being logged as dropped or rejected

my question is; is this a reasonable overhead for the firewall. what sort of percentage of your log entries are dropped or rejected

thank you

Laurence