Question

12

Configure a network interface into promiscuous mode

rated 0 times [ 12] [ 0] / answers: 1 / hits: 196868 / 2 Years ago, wed, may 4, 2022, 12:52:01

I am working on Ubuntu 12.04 LTS server on VMware Workstation. I need to configure my network interface to work in promiscuous mode.

This is my configuration:

auto eth1

iface eth1 inet manual

up ip address add 0/0 dev $IFACE

up ip link set $IFACE up

up ip link set $IFACE promisc on



down ip link set $IFACE promisc off

down ip link set $IFACE down

When I execute

netstat -i

the flag is BMRU.

Is my configuration correct or do I need to execute some extra commands?

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zebrla

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3 Years ago

answered 2 Years ago tudatchful · Accepted Answer

Well the problem is not in the network card because VMware always enables promiscuous mode for virtual interface. But the problem is within the configuration. It is not enough to enable promiscuous mode in the interface file. I had to add this line:

ifconfig eth1 up

ifconfig eth1 promisc

in the /etc/rc.local file because when i restart the network service, eth1 is set down. So adding this lines would tell the os to not shutdown eth1.