-> RDP Shortpath doesn't support Symmetric NAT, which is the mapping of a single private source *IP:Port* to a unique public destination *IP:Port*. This is because RDP Shortpath needs to reuse the same external port (or NAT binding) used in the initial connection. Azure Firewall and Azure NAT Gateway use Symmetric NAT. Where multiple paths are used, for example a highly available firewall pair, external port reuse cannot be guaranteed. For more information about NAT with Azure virtual networks, see [Source Network Address Translation with virtual networks](../virtual-network/nat-gateway/nat-gateway-resource.md#source-network-address-translation).
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