DHCP Configuration

By default, the DHCP client is set to active within the Single Node Virtual Appliance, and it will allocate an IP address when deployed to a network with an active DHCP Server.

However, we understand there are certain scenarios where disabling DCHP and configuring your system with a static IP address is required.

Configure DHCP

To configure DHCP within the Glasswall Single Node Virtual Appliance, follow the steps outlined below:

1. Create an additional configuration file in the following area path: /etc/cloud/cloud.cfg.d/ and append the following to it: network: {config: disabled}

• Create new file to disable cloud-init from overwriting configuration:

sudo touch /etc/cloud/cloud.cfg.d/99_disable_net_config.cfg

• Append settings to your new cloud-init config file:

sudo echo "network: {config: disabled}" >> /etc/cloud/cloud.cfg.d/99_disable_net_config.cfg

• Or to manually edit the config file:

sudo vi /etc/cloud/cloud.cfg.d/99_disable_net_config.cfg

2. Disable DHCP on your network interface /etc/sysconfig/network-scripts/ifcfg-eth0

• Set BOOTPROTO=static

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

3. Modify the network configuration and DHCP configurations using Network Manager Text User Interface (nmtui)

• Open nmtui by typing the following command in your terminal:

sudo nmtui 

• Use the arrow keys to navigate to Edit a connection and press Enter.
• Select the network connection you want to modify, and press Enter.
• Navigate to IPv4 CONFIGURATION or IPv6 CONFIGURATION depending on which is required for your configuration.
• Press Enter and a menu will appear. Use the arrow keys to navigate to Manual and press Enter. This will disable DHCP and allow you to manually enter IP settings.
• Fill in the Addresses, Gateway, and DNS server fields as needed.
• Navigate to OK and press Enter to save your changes.
• Navigate to Back and then Quit to exit nmtui.
• Clean cloud-init:

sudo cloud-init clean

• Reboot the system with:

sudo reboot now

4. Log back in to the system and confirm your network settings:

ip route | grep default

(i.e. default via <ip address> dev ens32 proto static metric 100 )

5. Confirm all Glasswall pods are operational

kubectl get pods -w