Fortinet
Fortinet Support (registration required) http://support.fortinet.com
QNAP
QNAP Support http://www.qnap.com/i/en/product_x_down/
ZyXEL ZyXEL Support http://www.zyxel.com/support/index.htm
  ZyXEL Global FTP Site ftp://ftp.zyxel.com