This tool is an Ethernet bridge. It has to be run on a computer having two network cards. This computer cuts the network in two. It permits to limit the flow. This can be used to simulate a slow network in order to test an application. A --max12 or --max21 of 0 means no limitation. This tool may need to be run with admin privilege in order to sniff and spoof.
| parameter | description | example |
| -d|--device1 device | first device | Eth0 |
| -D|--device2 device | second device | Eth0 |
| -m|--max12 uint32 | max byte/sec from 1 to 2 | 0 |
| -M|--max21 uint32 | max byte/sec from 2 to 1 | 0 |
| -v|--verbose|+v|--no-verbose | verbose | This boolean is set. Use + or --no- to unset it. |