NAT & its Types | U-Turn NAT | Static NAT | Dynamic IP NAT | NAPT

[ReadTech]

In a series of articles from Basic to advance Network Security, as today we will explain the topics Below.

• ·       NAT & its types
• ·       U-Turn NAT.

What is NAT?

NAT means translation of IP Address. Normally everyone understands that translation from private (non-routable) to public routable IP, but actually this translation can be between Private-to-Public and Public-to-Private IP Addresses. Let’s Clarify in Details Below.

Types of NAT?

• Ø  Source NAT
• Ø  Destination NAT

Source NAT: In the source NAT below are two conditions

• Ø  Traffic flow from LAN(Internal) to Internet (WAN) and the source private IP address will be translated.

Types of Source NAT:

Dynamic IP and Port (DIPP) OR NAPT (Network Address port translation):

In this type of Source NAT, the Translation of one-to-many IP Addresses plus different port number, for example in LAN have 10 hosts all are translating to one public IP Address with different port.

This NAT is also called interface-based NAT as all Internal LAN hosts translate to one external Public IP Address.

Dynamic IP: Dynamic translation of one-to-one means if five hosts in LAN & five public IP Addresses then all are translating to unique public IP Addresses without changing port number. If add one new host in LAN as now 6 then this host will not translate & connection dropped.

The Best Design in this case is to configure Dynamic IP & DIPP NAT.

Static Vs Dynamic IP NAT:

Types of Destination NAT:

Destination U-Turn NAT:

for the complete reading below link for reference

www.readteknology.com/2023/07/nat-its-types-u-turn-nat-static-nat.html