08-06-2009
Changing ip in a custom way
Hi.
I hope someone can help me. I have e very special question.
I have a Lunix server and I have installed Webmin on it. This way, I can create a login for an other user and give him restricted access to some custom commands I set up.
One of the commands i would like to setup, is for him to change the ip adress. With Webmin, I have the option to edit files en perform commands afterwards, so my first thought was to edit the ifcfg-eth'x' file (x because i have several network cards). But the file contains too much data, for I want him to only be able to change the IP-adress, Netmask and Gateway (of 1 of the cards).
Standard it looks something like this:
# Intel Corporation 80003ES2LAN Gigabit Ethernet Controller (Copper)
DEVICE=eth0
BOOTPROTO=none
BROADCAST=192.168.101.255
IPADDR=192.168.101.91
IPV6INIT=no
IPV6_AUTOCONF=yes
NETMASK=255.255.255.0
NETWORK=192.168.101.0
ONBOOT=yes
GATEWAY=192.168.101.1
TYPE=Ethernet
PEERDNS=yes
USERCTL=no
when actually I would only need something like this:
IPADDR=192.168.101.91
NETMASK=255.255.255.0
GATEWAY=192.168.101.1
Is there a way to link the original file to a new file, and when they edit teh new file, because of the link the original file will also be edited (the identical lines as IPADDR etc), and after which i give the command to restart the network devices, which allows the user to change only the given data in that new file, and so make him activate these new settings.
I hope I was clear enough; I know its something strange, but i need it in a very specific service.
thanks in advance!
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LEARN ABOUT DEBIAN
ifscheme-mapping
IFSCHEME(8) Commands IFSCHEME(8)
NAME
ifscheme - scheme control for network interfaces
SYNOPSIS
ifscheme [-v] [[-s] newscheme]
mapping <interface> script ifscheme-mapping
DESCRIPTION
ifscheme allows you to change network configuraton schemes or query the current scheme. It integrates with the ifup(8) command and inter-
faces(5). For example, you might use this program to configure a "home" scheme and a "work" scheme for a network device on a laptop. When
you move between home and work, a simple command can reconfigure your networking.
If you run the program with no parameters, it will tell what the current network scheme is.
The ifscheme-mapping utility is used to tell the ifup and ifdown utilities about the current scheme.
OPTIONS
-v
--verbose
Run in verbose mode. This is passed in to the ifup and ifdown programs as well.
-l
--list list all schemes available/defined in /etc/network/interfaces.
newscheme
-s newscheme
--scheme newscheme
Change to a new network configuration scheme. When the scheme is changed, network interfaces that were using the old scheme will be
taken down and brought back up to use the new configuration scheme. -s or --scheme are mandatory if newscheme begins with a -.
CONFIGURATION
To make the program do anything useful when a scheme is selected, you must edit /etc/network/interfaces to add a mapping for the interface
(or interfaces) that can be controlled on a per-scheme basis. Suppose you want to control eth0 in this way. You might have an existing eth0
configuraton in there, such as:
auto eth0
iface eth0 inet static
address 192.168.1.5
netmask 255.255.255.0
gateway 192.168.1.1
To change this so you can chose between static routing and dhcp, replace it with the following (it helps to ifdown the interface first).
auto eth0
mapping eth0
script ifscheme-mapping
iface eth0-home inet static
address 192.168.1.5
netmask 255.255.255.0
gateway 192.168.1.1
iface eth0-work inet dhcp
Now if you run "ifscheme home" and ifup the interface, you'll get the eth0-home configuration stanza. If you run "ifscheme work", it will
be changed to the eth0-work stanza. You can add additional stanzas as desired, but the label must always be of the form <hardware inter-
face>-<scheme name>.
If you have a second interface (perhaps a wireless network card on eth1), you can duplicate the above for that interface, changing the eth0
and the configuration details as appropriate, but remember to add an iface stanza for every scheme name for the second interface.
FILES
/etc/network/interfaces
the interfaces definition file
/etc/network/run/scheme
the current scheme
/etc/network/run/ifstate
a record of the current state of the interfaces, managed by ifup and ifdown
BUGS
All schemed interfaces will have the same scheme.
Any schemed interface which does not have an entry for the current scheme and is not configured when the scheme is changed will not be suc-
cessfully configured when it is brought up.
SEE ALSO
interfaces(5) ifup(8) ifdown(8)
DISTRIBUTION
Redistribution is subject to the GNU public license.
AUTHORS
Joey Hess <joey@kitenet.net>, Peter Wilson <pwilson@cs.hmc.edu>
IFSCHEME(8)