What is Dynamic NAT in Networking?

Understanding NAT is very important in the networking world. So, Dynamic NAT plays a vital role in this field. In this article, I will explain the working logic of this type.

I will also take a look at its configuration and compare it with other mapping types. If you are a student or new to the networking field, you will quickly understand the concept of Dynamic NAT. So, let’s unleash its potential in network address translation!

Understanding Dynamic NAT

It works with the same logic as Static NAT and PAT. They all convert private IP addresses to global IP ones. However, the difference is that private IP numbers are automatically mapped from a pool.

Static, on the other hand, enters routes manually. In dynamic, the IPs allocated by the ISP are grouped with an access list. In addition, the local network is mapped to this list. In this way, global and private addresses are mapped one-to-one. Finally, the IP numbers to be converted are mapped to a vacant Public one.

How Does It Work?

The general operating logic of the network translation system is as follows.

In the image above, when the address 192.168.1.10 is accessing the Internet, Network Translation kicks in. In the process, the IP from the ISP is placed in the Source part of the IP packet.

Also, the private IP uses a free one in the block 200.1.1.1 – 200.1.1.10. Build the topology specified in the Packet Tracer better to understand the dynamic system’s working system.

In the image above, computers with IP addresses 192.168.10.10 and 192.168.10.20 are pinging address 10.0.0.2. At this time, the addressing system configured on the Router comes into play.

Moreover, the computers in the LAN use the addresses 10.0.0.5 – 10.0.0.10 allocated by the ISP. Since the first transaction is made from 192.168.10.10, the Router maps the idle 10.0.0.5.

Later, in the address output, 192.168.10.20 becomes 10.0.0.6. As a result, you definitely need to create a pool for Dynamic numbers.

Configuration ⇒ Video

Watch the video below to discover how Dynamic mapping works between two routers in Packet Tracer. Also, consider subscribing to our YouTube channel to show your support!

Conclusion

In short, Dynamic NAT provides valuable insight into network address translation. However, since cost and scalability are essential, purchasing multiple IPs from the ISP can be expensive. This makes the Dynamic network address translator system less economical.

In fact, I recommend using PAT instead due to its cost-effectiveness and flexibility. As a result, PAT is often the preferred option. Thank you for exploring the world of LAN address translation with us!