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Home Operating System CentOS

Correcting Network Configuration After Snapshot Restore

How VPS by How VPS
October 1, 2019
in CentOS
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Contents

  1. CentOS
  2. Debian/Ubuntu
  3. Windows
  4. Want to contribute?


After restoring a snapshot to a new machine, you may encounter issues caused by the MAC address of the network adapter changing. Usually, when the network adapter changes the operating system will create a new network adapter for it. You’d typically see the network adapter on ‘eth1’ (or eth2 if you had private networking enabled).

CentOS

  • Log in to your server via the KVM in your control panel
  • Remove the contents of /etc/udev/rules.d/70-persistent-net.rules
  • Open /etc/sysconfig/network-scripts/ifcfg-eth0, and change the contents to the following:

    DEVICE=eth0
    TYPE=Ethernet
    ONBOOT=yes
    NM_CONTROLLED=yes
    BOOTPROTO=dhcp
    DNS1=8.8.8.8
    NAME="System eth0"
    
  • Reboot your server
  • Once you have network connectivity again, you can permanently fix these issues by installing the cloud-init package from EPEL. This software will take care of adjusting your network adapter configuration whenever a snapshot is restored.

Debian/Ubuntu

  • Log into your server via the KVM in your control panel.
  • Remove the contents of /etc/udev/rules.d/70-persistent-net.rules
  • Review the contents of /etc/network/interfaces and update any IP addresses to match the current server.
  • Reboot your server
  • Once you have network connectivity again, you can permanently fix these issues by installing the cloud-init package. This software will take care of adjusting your network adapter configuration whenever a snapshot is restored.

Windows

  • No changes are necessary for Windows. It will automatically start using the new network adapter.

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