Manage NAT for virtual datacenters

Display NAT rules

When the Network Address Translation (NAT) integration is available in your environment, the NAT tab will display the NAT IPs and NAT rules for your virtual datacenters. From here you can manage NAT IPs and within the VM you can manage NAT rules.

Create a virtual datacenter with NAT

To create a virtual datacenter with NAT, create a virtual datacenter as usual, and the platform will automatically add a NAT IP and create an SNAT rule for all outgoing traffic. Then you can also create DNAT rules to associate a private IP attached to VM with a NAT IP, and an additional SNAT rule for that NAT IP.

Use a NAT IP for a load balancer

You can use a NAT IP as a public IP address for load balancers, and the platform will automatically create a NAT rule to match the load balancer routing rule port mappings.

Obtain an additional NAT IP 

In addition to the NAT IP assigned to the virtual datacenter, you can obtain NAT IPs for creating additional NAT rules.

To obtain a NAT IP

1. Click the + Add button on the top right-hand side of the screen
2. Select the NAT network and click Accept

The platform will reserve an IP and allocate it to your virtual datacenter.

You can then use the NAT IP as the public IP address for a load balancer or to provide access to a private IP address.

Create NAT rules

After you obtain a NAT IP, you can create a destination NAT rule for a private IP address on a VM. 

To create a NAT rule:

1. Go to Virtual datacenters → Virtual appliances.
2. Edit your VM
3. If your VM does not yet have an IP, go to Network → NICs and add a private IP
4. Go to Network → NATs
5. Click the + button on the top right-hand side of the tab
6. Enter the details of the NAT rule, which by default will be a DNAT rule
   
   1. You cannot use the Original port for the NAT IP in more than one NAT rule. The platform will display the ports that are already used in other rules for the selected NAT IP.
   2. To create an additional SNAT rule for traffic from the private IP to the outside network through the NAT IP, select the SNAT checkbox
7. Click Add
8. Save the VM

Modify and delete NAT rules

From the NATs tab you can also select a NAT rule to edit or delete it.