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This page describes how to create NAT rules for virtual datacenters. For details of how to configure NAT networks in infrastructure, see Manage NAT |
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Display NAT rules
When the Network Address Translation (NAT) integration is available in your environment, to display NAT IPs and NAT rules:
Go to Virtual datacenters
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and select virtual datacenter
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Go to Network → NAT
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To display NAT rules for a VM:
Go to Virtual datacenters
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Select the VM
Go to VM control panel →
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NAT
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To manage or display NAT rules for a VM:
Go to Virtual datacenters
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Edit a VM
Go to Networks → NAT
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Create a NAT rule for DNAT
To enable VMs outside your VDC to connect to a VM with a private IP address, after you obtain a NAT IP, create a destination NAT rule, which is also called a DNAT rule.
To create a DNAT rule:
Go to myCloud → Virtual datacenters → Virtual appliances
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Edit your VM
If your VM does not yet have an IP, go to Network → NICs and add a private IP
Go to Network → DNAT
Click the + add button on the top right-hand side of the tab
Enter the details of the DNAT rule
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For the Original (NAT IP), select the IP address to receive external connections
Select the Protocol for the connection, which can include TCP, UDP, any, and ICMP
For the Translated IP, select the private IP that is attached to the VM
Optionally, select the checkbox to Use all ports OR
Enter the Original port for external connections. You cannot use an Original port for a 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.
AND for the Translated port, enter the port on the VM
Click Add
Save the VM
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Create a NAT rule for SNAT
To send outgoing traffic through a NAT IP that is not the default one, add an additional SNAT rule with these steps:
To create an SNAT rule:
Go to Virtual datacenters → Virtual appliances
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Edit your VM
If your VM does not yet have an IP, go to Network → NICs and add a private IP
Go to Network → SNAT
Click the + add button on the top right-hand side of the tab
Enter the addresses of the SNAT rule
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For the Original IP, select the IP that is attached to the VM
For the Translated (NAT IP), select the IP address to display for outgoing connections
Click Add
Save the VM
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Use a NAT IP for a load balancer
To use a NAT IP address as a public IP address for a load balancer:
Use the virtual datacenter's NAT IP address or obtain an additional NAT IP address. See Obtain an additional NAT IP address for a virtual datacenter
Create the load balancer and select the NAT IP
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The platform will automatically create a NAT rule to match the port mappings of the routing rule of the load balancer.
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Obtain an additional NAT IP for your virtual datacenter
In addition to the NAT IP address assigned to the virtual datacenter, you can obtain NAT IP addresses for creating additional NAT rules.
To obtain an additional NAT IP address:
Go to Virtual datacenters → Network → NAT
Click the + add button on the top right-hand side of the screen
Select the NAT network and click Accept
The platform will reserve an IP address and allocate it to your virtual datacenter.
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You can then use the NAT IP address as the public IP address for a load balancer or to provide access to a private IP address.
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Limit NAT IP bandwidth for a VDC
You can use Quality of Service (QoS) traffic shaping parameters to limit the bandwidth for all the NSX NAT IPs in a virtual datacenter.
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Privileges: Manage NAT bandwidth limit |
When you create a virtual datacenter, the new "natbandwidthlimit" attribute is present but you must edit the virtual datacenter to enable it in the platform and in the NSX.
To edit the bandwidth limit and apply it in the NSX:
Select the virtual datacenter and go to Network → QoS
Click the pencil edit button
To enable the bandwidth limit in a specific direction, select the Enabled checkbox for that direction
Set QoS values for your virtual datacenter. Be sure to allow enough bandwidth to share between all the NAT IPs in the virtual datacenter.
Field
Description
Provider ID
Read only
Enabled
To enable traffic shaping in a specific direction, select this checkbox
Average
The average amount of bandwidth, in bits per second, that the virtual datacenter can use
Peak
The maximum bandwidth in bits per second that the virtual datacenter can use
Burst size
The amount of data that can be transmitted at the peak bandwidth rate in bytes. A burst bonus accumulates when traffic is below the Average value and this bandwidth can be used for bursts.