Help Center/ NAT Gateway/ User Guide (Ankara Region)/ Service Overview/ NAT Gateway Specifications
Updated on 2025-01-10 GMT+08:00
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NAT Gateway Specifications

The NAT gateway performance is determined by the maximum number of SNAT connections supported.

Public NAT Gateway

An SNAT connection consists of a source IP address, source port, destination IP address, destination port, and a transport layer protocol. The source IP address is the EIP, and the source port is the EIP port. An SNAT connection uniquely identifies a session.

Throughput is the total bandwidth of all EIPs in DNAT rules. For example, a public NAT gateway has two DNAT rules. The EIP bandwidth in the first DNAT rule is 10 Mbit/s, and that in the second DNAT rule is 5 Mbit/s. The throughput of the public NAT gateway will be 15 Mbit/s.

Select a public NAT gateway based on your service requirements. Table 1 lists the public NAT gateway specifications.
Table 1 Public NAT gateway specifications

Specifications

SNAT Connections

Bandwidth

Queries Per Second (QPS)

Small

10,000

20 Gbit/s

10,000

Medium

50,000

20 Gbit/s

10,000

Large

200,000

20 Gbit/s

10,000

Extra-large

1,000,000

20 Gbit/s

10,000
  • The PPS of different NAT gateway specifications is the total PPS in both inbound and outbound directions.
  • If the number of requests exceeds the maximum allowed connections of a public NAT gateway, services will be adversely affected. To avoid this situation, create alarm rules on the Cloud Eye console to monitor the number of SNAT connections.

Private NAT Gateway

An SNAT connection consists of a source IP address, source port, destination IP address, destination port, and a transport layer protocol. The source IP address is the transit IP address, and the source port is the port of the transit IP address.

Select a private NAT gateway based on your service requirements. Table 2 lists the private NAT gateway specifications.

Table 2 Private NAT gateway specifications

Specifications

SNAT Connections

Bandwidth

QPS

Small

2,000

200 Mbit/s

6000

Medium

5,000

500 Mbit/s

9000

Large

20,000

2 Gbit/s

10,000

Extra-large

50,000

5 Gbit/s

10,000

If the number of requests exceeds the maximum allowed connections of a private NAT gateway, services will be adversely affected. To avoid this situation, create alarm rules on the Cloud Eye console to monitor the number of SNAT connections.

Parent topic: Service Overview