LIST natpf rules in Virtualbox/Vagrant

Question

I often get errors like this when running Vagrant:

VBoxManage: error: A NAT rule of this name already exists
VBoxManage: error: Details: code NS_ERROR_INVALID_AR         


        

Answer 1

You can delete a rule from the command line by issuing:

VBoxManage controlvm "boot2docker-vm" natpf1 delete "tcp-port80"

the last parameter in quotes is the rule name you wish to delete.