ipfw question

[adrian kok]

Dear all

I have 2 questions

1/ Recently, my mrtg graph showed many spikes
"Incoming" in outer interface of the router.

ls it possible to log them and check?

If I log everthing, I am afraid to slow down the
network. What is the best way to do it?


2/ I read some firewall docs. they said that it is
good to allow 5% bandwidth for icmp only

ls it true?

how can I do it?

Thank you