====== Ubuntu - Networking - Configuration - Promiscuous Mode ======

**Promiscuous mode** is a security policy, which allows a network adapter to see all traffic traversing the network.

  * By default, a network adapter usually only receives frames that are meant for it.

----

<code bash>
ip link set eth1 promisc on
</code>

----

<code bash>
ifconfig eth0 promisc
</code>

----

Put the following in /etc/sysconfig/network-scripts/ifcfg-eth1

<file bash /etc/sysconfig/network-scripts/ifcfg-eth1>
BOOTPROTO=static
DEVICE=eth1
ONBOOT=yes
TYPE=Ethernet
PROMISC=yes
USERCTL=no
PEERDNS=no
HWADDR=xx:xx:xx:xx:xx:xx
</file>

<WRAP info>
**NOTE:**  Change eth1 and the hardware address (HWADDR=xx:xx:xx:xx:xx:xx) to reflect your system.
</WRAP>