Re: Network Slowdowns?

[Gergo Szakal]

Use a PF ruleset where you "block log" unwanted traffic (i. e. only 
allow what you want), and use:

tcpdump -nettt -i pflog0
Make sure you have pflog either in the kernel or loaded as a module, and 
have pflog_enable="YES" in /etc/rc.conf.
This way you can see whether you're having a DoS attack or something 
like that.