What is Nat Network

   What is Nat in  Network  

What is Network Address Translation What is Network Address Translation (NAT)? Network Address Translation (NAT) is the process by which a network device (usually a firewall) assigns a public address to a computer (or group of computers) within a private network. is. A primary use of NAT is to limit the number of public IP addresses an organization or business must use for economic and security reasons.

The most common form of network translation includes large private Includes network. Private addressing schemes are suitable for computers that only need to access resources within the network. B. Workstations that require access to file servers and printers. Routers in private networks can easily route traffic between private addresses. However, to access resources outside your network, such as the Internet, these computers need a public address so that requests can be answered. This is where NAT comes into play. Internet requests that require network address translation (NAT) are very complex, but they execute so quickly that the end user hardly notices them. A workstation on the network sends a request to a computer on the Internet. A router in the network sees that the request is not for a resource inside the network and sends the request to the firewall. The firewall recognizes requests from computers with internal IPs. She then sends the same request to the Internet using her public address and sends the response back from the Internet resource to a computer in her private network. From the perspective of resources on the Internet, they send information to firewall addresses. From the workstation's perspective, the communication appears to be directly with sites on the Internet. This way he uses NAT, all users in a private network accessing the internet will have the same public IP address when using the internet. This means that hundreds or thousands of users only need one public address. Most modern firewalls are stateful. This means that connections can be established between internal workstations and Internet resources. You can track connection details such as ports, packet ordering, and IP addresses involved. This is called connection status tracking. This allows you to track sessions that consist of communications between your workstation and the firewall, and between the firewall and the Internet. The firewall discards all information about the connection when the session ends. In addition to allowing workstations with internal IP addresses to access the Internet, network address translation (NAT) has other uses. In large networks, some servers may act as web servers and require access from the Internet. These servers are assigned public IP addresses in the firewall, so the public can access them only through that IP.