Ubuntu: What is the difference between iface eth0 inet manual and iface eth0 inet static?



Question:

What is the difference between iface eth0 inet manual and iface eth0 inet static?

Thanks


Solution:1

iface eth0 inet static: Defines a static IP address for eth0

iface eth0 inet manual :To create a network interface without an IP address at all. Usually used by interfaces that are bridge or aggregation members, or have a VLAN device configured on them

For more information read:

Take a look on the file /usr/share/doc/ifupdown/examples/network-interfaces.gz, you can know more about manual and some cases to use:

# Set up an interface to read all the traffic on the network. This   # configuration can be useful to setup Network Intrusion Detection  # sensors in 'stealth'-type configuration. This prevents the NIDS  # system to be a direct target in a hostile network since they have  # no IP address on the network. Notice, however, that there have been  # known bugs over time in sensors part of NIDS (for example see   # DSA-297 related to Snort) and remote buffer overflows might even be  # triggered by network packet processing.  #   # auto eth0  # iface eth0 inet manual  #   up ifconfig $IFACE 0.0.0.0 up  #       up ip link set $IFACE promisc on  #       down ip link set $IFACE promisc off  #       down ifconfig $IFACE down    # Set up an interface which will not be allocated an IP address by  # ifupdown but will be configured through external programs. This  # can be useful to setup interfaces configured through other programs,  # like, for example, PPPOE scripts.  #  # auto eth0  # iface eth0 inet manual  #       up ifconfig $IFACE 0.0.0.0 up  #       up /usr/local/bin/myconfigscript  #       down ifconfig $IFACE down  

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