Do not install cracked LDT 2009 on any machine connected to the internet or your company network. Instead, contact Autodesk support to see if your legacy license can be converted to a current Civil 3D subscription, or use a virtual machine with your old, valid license.
If you still have a physical installation DVD and a valid serial number from 2009 (e.g., from a former employer or an old student kit), you can install it on a personal machine. However, activation servers for LDT 2009 are mostly offline. You would need to use the "Phone Activation" method, which Autodesk support no longer processes for versions older than 2015. AutoCAD Land Desktop 2009 Free Download