Firewall/NAT/Traffic Shapper

[Ionut Anghel]

Hi,

I'm trying to setup a Firewall/NAT/Traffic Shapper server using FreeBSD 5.3
I install all the packages, including kernel sources...everything's ok.
Then I activate ipnat and natd in rc.conf and all the clients behind the 
router can access the Internet.
But, if I want to install dummynet (i add options dummynet and ipfirewall in 
kernel source) and recompile the kernel, after the reboot, nothing's working 
any more! Not even from the server! I can't even ping a NIC. 
I have read lots of tutorials, but nothing's helpfull...
Please, tell me the correct steps I should follow in order to do what I want 
to do (or give me a good and complete tutorial)
Thanks in advance!

Ionut