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A single SNAT rule of a VPC NAT gateway can be associated with multiple NAT IP addresses, which significantly increases the maximum concurrent connections on the NAT gateway. Previously, when you accessed the same destination IP address and port through a VPC NAT gateway, the maximum number of concurrent connections was 55,000. Now, the maximum number of concurrent connections is N × 55,000, where N is the number of IP addresses configured in the SNAT entry.