Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04 by Matthew Helmke

Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04 by Matthew Helmke

Author:Matthew Helmke [Helmke, Matthew]
Language: eng
Format: epub, mobi
Tags: Linux, Operating Systems, Computer Science, Computers & Technology
ISBN: 9780672336935
Publisher: Sams Publishing
Published: 2013-11-24T14:00:00+00:00


Devices

Do not ever advertise that you have set a NIC to promiscuous mode. Promiscuous mode (which can be set on an interface by using ifconfig’s 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 is not good when a bridge is connected to the Internet. A router enables you to filter which packets are relayed.



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