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I to setup multiple IPs on my Ubuntu 16.04.1 server. I have it in a data center and they gave me 5 IPs range 170-174.

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You need to create aliases of your network interface.

  • By creating temporary aliases using ip address add command. The aliases setup this way will be lost upon a reboot and you will need to recreate those aliases.

    sudo ip addr add xx.xx.xx.xx/xx dev eth0
    
    # For example
    
    sudo ip addr add 172.16.100.170/24 dev eth0
    
  • If you need a more permanent solution, you would have to edit /etc/network/interfaces file and add alias definitions there.

Then use ip addr show command to see the changes. Then you would have to do sudo ifdown eth0 && sudo ifup eth0 to activate these settings without a reboot.

  • Ok so I did this and 4 out of the 5 ips work. The only work not working is 171. It is a /29 ip – Ajaydev Singh Sep 1 '16 at 10:26
  • since you wanna use /29, 2**(32-29) - 2 = 2**3 - 2 = 8 - 2 = 6 that means only 6 hosts are allowed to use. – Rahul Sep 1 '16 at 10:32
  • You do think its a problem with the hosting company because I added all of them but 171 is not working but others work and have no problems. – Ajaydev Singh Sep 1 '16 at 10:51

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