zeldor.biz

Linux, programming and more

Copyright © 2025
Log in

Linux change MAC-Address

May 30, 2012 by Igor Drobot Leave a Comment

Tiny howto for changing the MAC-Address of your hardware network interface (NIC). If a special firewall accept packets only from a special MAC-Address, with this work around you will trick it out to accept packets from your NIC:

1
/etc/init.d/networking stop

/etc/init.d/networking stop

[Read more…]

Filed Under: Linux, Ubuntu, Virtualization Tagged With: firewall, hetzner, ifconfig, MAC Address, Mac OS X

NIC PROMISC mode

June 6, 2011 by Igor Drobot Leave a Comment

It was a little bit strange situation, I found my outer interface in a PROMISC mode.
“ip a” or “ifconfig” output shows that my eth0 interface was in the PROMISC mode, but I don’t understand, why?

1
2
eth0: <broadcast,multicast,promisc,up,lower_up> mtu 1500 ...
</broadcast,multicast,promisc,up,lower_up>

eth0: <broadcast,multicast,promisc,up,lower_up> mtu 1500 ... </broadcast,multicast,promisc,up,lower_up>

I don’t used tcpdump or similar tools in this moment.
After I spend some time to my favorite search engine, I found how to disable manually this mode:

1
ifconfig eth0 -promisc

ifconfig eth0 -promisc

Filed Under: Linux Tagged With: Debian, ifconfig, PROMISC mode, promiscuous mode

Yeaaah Cookie! We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Ok