External Interface

Scenarios for External Interface

Attaching an External Interface to an instance is useful when you want to:

• Have a direct IP address in OS for some special protocol (Eg SIP…)

• Build your own Firewall or VPN gateway with the instance that have internal and external interface

• Create a low-budget, high-availability solution.

External Interface basics

You can create an external interface, attach it to an instance, detach it from an instance, and attach it to another instance. When you move a external interface from one instance to another, network traffic is redirected to the new instance.

You need to configure IP address for External Interface from within instance, static or DHCP configuration will work. You can only attach External Interface to Instance that is not associated with Floating IP.

Work with External Interface

Create External Interface

1. Go to VNG Cloud portal console, navigate to External Interface page

2. Create External Interface, you can check the price on right panel.

3. After create you will get the IP information including address, netmask and gateway, these informations need for operation later.

Attach/Detach to/from Instance

1. Go to VNG Cloud portal console, navigate to Instance page

2. Go to detail of the Instance that need to attach the External Interface, go to tab Network Interface

3. Click Attach an Interface and select your existing External Interface. In case of Detach, just confirm the action after click Detach an Interface.

4. After attach the External Interface, you must configure network from within instance with its information.

Delete External Interface

1. Go to VNG Cloud portal console, navigate to External Interface page

2. Select the External Interface to delete, click Delete on right side.