I'm running a 2.4.2 firewall box with IPtables, and would like to change
some of the logging behavior, but don't find much help in the man pages...

First, the default logfile is /var/log/messages. How do I configure it to
dump all logs into, e.g., /var/log/firewall?

Second, I'm getting regular periodic pings from a particular source to the
firewall. How do I tell iptables skip logging on only pings from that
source to the firewall (but log all others)?

Thanks for any help, 

Andy