> For the complete documentation index, see [llms.txt](https://titannet.gitbook.io/titan-network-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://titannet.gitbook.io/titan-network-en/huygens-testnet/about-huygens-testnet/installation-and-earnings/rules-for-obtaining-node-credits/resource-rewards-of-poa/nat-rating.md).

# NAT Rating

#### NAT Rating$$M\_N$$

The NAT (Network Address Translation) type directly affects connection quality and stability. Therefore, corresponding credit rewards have been set for different 

NAT types:

Public Network IP = 1.5

NAT 1  = 1.4

NAT 2  = 1.3

NAT 3  = 1.1

NAT 4  = 1

#### Additional Information about NAT:

**NAT1:** Full Cone NAT is the most lenient network environment with virtually no restrictions on IP and port usage.

**NAT2:** Address-Restricted Cone NAT imposes restrictions on IP addresses compared to NAT1 Ports remain unrestricted.

**NAT3:** Port-Restricted Cone NAT imposes restrictions on both IP addresses and ports compared to NAT2, meaning both the IP and port are restricted.

 

**NAT4:** Symmetric NAT is characterized by restricted port cone-like properties, where each internal address request to a specific external address may be bound to a new port number. In other words, the port number mapped to different external addresses may vary. This form of NAT essentially says goodbye to P2P.