How to force the use of an ip of my server eth0:1, if my server interoge example google.com
when i use my php scripts, the ip that google must see is eth0:1
# The primary network interface
auto eth0
iface eth0 inet static
address 173.249.3.15
netmask 255.255.255.0
gateway 173.249.3.1
dns-search invalid
dns-nameservers 213.136.95.10 213.136.95.11
up ip route replace 173.249.3.0/24 via 173.249.3.1 dev eth0
# new ip
auto eth0:1
iface eth0:1 inet static
address 164.68.125.112
netmask 255.255.255.0
gateway 164.68.125.1