IPv4 NAT IP Information 
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You have been assigned a range of 20 ports along with your NAT IPv4 address.
The first 20 ports are based on the last octet of your IP, you can use these for anything you want, examples below: 

EXAMPLES: 
172.16.0.3 has the following port range forwarded: 301 - 320 
172.16.0.13 has the following port range forwarded: 1301 - 1320 
172.16.10.33 has the following port range forwarded: 3301 - 3320 
172.16.20.133 has the following port range forwarded: 13301 - 13320
172.16.30.7 has the following port range forwarded: 701 - 720 
172.16.40.17 has the following port range forwarded: 1701 - 1720
172.16.50.221 has the following port range forwarded: 22101 - 22120

IPv4 NAT SSH-Port Information
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In addition to the 20 Ports that can be freely used, there is also an additional Port-Forward for SSH.
This is calculated by prepending the last octet of the private IP-Address to the ssh port.

EXAMPLES:
172.16.0.3 has the following port forwarded to port 22: - 321 
172.16.0.133 has the following port forwarded to port 22: - 13321