Try speedtest.net if it is has a reasonably nearby test server for you.
How is your FreeBSD box connected to the Internet? Are you sure it is your WAN connection that is slow? It may be the LAN as well if you have a faulty cable, switch or NIC.
Sometimes the cheap "soap box" broadband routers become bogged down (especially when running a torrent client on the LAN) and slow everything down too, but I never saw xfers that slow!