Eltima makes some really good software, been using their serial over ethernet software for years, it's rocksolid, and tons of options. Looks like there is a 20% coupon floating around, which might make this a good investment:
http://www.eltima.com/products/usb-over-ethernet/
MUO-ME-20
http://www.makeuseof.com/tag/special-makeu...ltima-software/
http://www.eltima.com/products/usb-over-ethernet/
MUO-ME-20
http://www.makeuseof.com/tag/special-makeu...ltima-software/