[Question] Public domain to different RDP sessions

What would be the best way to use the same external IP with domain to be able to log into multiple servers via RDP.

EXAMPLE:

Public IP: 1.2.3.4

Domain: yourmom.com

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(rdp01.yourmom.com) > 192.168.1.111:3389

(rdp02.yourmom.com) > 192.168.1.222:3389

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