debian vps ip alias

I needed my Debian VPS to show certain fake IP on ifconfig, so I've applied the following changes to /etc/network/interfaces file

# This configuration file is auto-generated.

# WARNING: Do not edit this file, your changes will be lost.

# Please create/edit /etc/network/interfaces.head and /etc/network/interfaces.tail instead,

# their contents will be inserted at the beginning and at the end

# of this file, respectively.

#

# NOTE: it is NOT guaranteed that the contents of /etc/network/interfaces.tail

# will be at the very end of this file.



# Auto generated lo interface

auto lo

iface lo inet loopback



# Auto generated venet0 interface

auto venet0

iface venet0 inet static

        address %DESIRED_FAKE_IP%

        netmask 255.255.255.255

        broadcast 0.0.0.0

        up route add -net %GATEWAY_IP% netmask 255.255.255.255 dev venet0

        up route add default gw %GATEWAY_IP%



auto venet0:0

iface venet0:0 inet static

        address %REAL_IP%

        netmask 255.255.255.0

        broadcast 0.0.0.0

If you're using VPS and those changes are getting overwritten on startup, create a new file /etc/network/interfaces.e and put the following script in cron @reboot:

#!/bin/sh
cp /etc/network/interfaces.e /etc/network/interfaces
/etc/init.d/networking restart