Kernel with IPFW and Dummynet

If you want to build a FreeBSD router based on IPFW firewall and dummynet for traffic limiting (and natd for Network Address translation) you will need these options in kernel. Copy GENERIC file to a new file, for example ROUTER (GENERIC file is located in /usr/src/sys/i386/conf) then edit and add the following options: # --------- add this to your ROUTER kernel config file ------------- options IPDIVERT options IPFIREWALL options IPFIREWALL_VERBOSE options IPFIREWALL_FORWARD options DUMMYNET options HZ=1000 # ---------------------- end of ROUTER file -------------------------- Comments HZ=1000 is used for better performance DUMMYNET is used for Dummynet support in kernel, pipes and queues for bandwith limit.