Changing your IP address after a server restore

Guide to updating network configurations on VPS and dedicated servers.

When you restore a dedicated server or a VPS from a backup, the system is often assigned a new IP address. To restore connectivity, you must manually update the network configuration files within the Operating System.

Ubuntu / Debian (Using Netplan)

Connect to the server via the console in your account dashboard.

Open the network configuration file:

sudo nano /etc/netplan/00-installer-config.yaml

Locate the eth0 block (or your specific interface name) and update the following:
- Addresses: replace the old IP with your new IPv4/IPv6 address.
- Routes/Gateway: update the via field with your new gateway.
- Nameservers: ensure your DNS resolvers are correct.

Example configuration:

network:
  version: 2
  ethernets:
    eth0:
      addresses:
        - [your_new_ipv4_address]/24
        - [your_ipv6_address]/48
      nameservers:
        addresses:
          - 8.8.8.8
          - 8.8.4.4
      routes:
        - to: default
          via: [your_new_gateway_v4]
        - to: ::/0
          via: [your_new_gateway_v6]

Save and exit (Ctrl + O → Enter → Ctrl + X).
Apply the changes:
```
sudo netplan apply
```

CentOS / Rocky Linux / AlmaLinux / Fedora (nmcli)

Identify your active network interface (usually eth0 or ens3):
```
nmcli connection show
```

Update the IPv4 address and gateway:

sudo nmcli connection modify 'eth0' ipv4.addresses [your_new_ipv4_address]/24
sudo nmcli connection modify 'eth0' ipv4.gateway [your_new_gateway_v4]

Activate the new settings:
```
sudo nmcli connection up 'eth0'
```

CentOS / RHEL (Legacy ifcfg method)

Open the interface configuration file:

sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0

Update the static parameters:

BOOTPROTO=static
IPADDR=[your_new_ipv4_address]
NETMASK=255.255.255.0
GATEWAY=[your_new_gateway_v4]
DNS1=8.8.8.8
DNS2=8.8.4.4
ONBOOT=yes

Restart the network service:
```
sudo systemctl restart network
```

Debian (Classic /etc/network/interfaces method)

Open the interfaces file:
```
sudo nano /etc/network/interfaces
```

Modify the interface block:

auto eth0
iface eth0 inet static
   address [your_new_ipv4_address]
   netmask 255.255.255.0
   gateway [your_new_gateway_v4]
   dns-nameservers 8.8.8.8 8.8.4.4

Restart the networking service:
```
sudo systemctl restart networking
```

Critical reminders

Losing connection: the moment you apply these changes, your old IP connection (including SSH) will drop. Switch to the Web Console immediately if you get locked out.
Accuracy: double-check the gateway and subnet mask provided in your Fornex dashboard. A single typo will prevent the server from reaching the internet.
Safety first: we strongly recommend taking a quick snapshot or a backup of your configuration files before making manual edits.

Help

If you have any questions or need assistance, please contact us through the ticket system — we're always here to help!