Lai,
If you're not running X, you may not need the tools. Some customers have had better experience using the e1000 (FreeBSD's 'em' driver) virtual NIC. Search the archive for more information on how to do this. If you are running FreeBSD 7.0 or later, you can rebuild the FreeBSD kernel with 'le' driver. It should work better than the default 'lnc' driver.
Thanks,
Joe