Do not ever advertise that you have set a NIC to promiscuous mode. Promiscuous mode (which can be set on an interface by using
promisc option) is good for monitoring traffic across the network and can often enable you to monitor the actions of someone who might have broken into your network. The
tcpdump command also sets a designated interface to promiscuous mode while the program runs; unfortunately, the
ifconfig command does not report this fact while
tcpdump is running!
Remember to use the right tool for the right job. Although you can use a network bridge to connect your network to the Internet, it would not be a good option. Bridges have almost become obsolete because they forward any packet that comes their way, which ...