Must contiguous addresses be specified in a NAT address pool

2

No.
The NAT address pool contains an address segment from a specific start address to a specific end address. You can configure address exclusion to exclude special addresses in this address segment. Therefore, the addresses in the NAT address pool can be non-contiguous.
In addition, the start address and end address can be the same. In this case, the NAT address pool contains only one IP address.

Other related questions:
Whether addresses in the NAT address pool are contiguous addresses
No. The NAT address pool contains IP addresses within a range specified by the start address and end address. You can use the address exclusion function to eliminate certain special IP addresses within in this IP address range. Therefore, the addresses in the NAT address pool may not be contiguous. In addition, the start address and the end address can be the same. In such a situation, only one address exists in the NAT address pool.

Can the global address of the NAT server be an address in the NAT address pool
No, the global address of the NAT server cannot be an address in the NAT address pool.

Whether the public IP address mapped to the USG5530 must be configured for the external network port or NAT address pool
You only need to configure NAT Server for the mapping instead of configuring the public IP address for the external network port or NAT address pool.

Whether AR NAT Server Global address is NAT Outbound address in the address pool?
Yes

Whether an address in the NAT address pool can be configured as a public IP address for NAT Server
Yes.

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