When we configured NAT ?where We Configured NAT, Either Customer end or ISP end or Both End.
We use NAT to convert the private ip address to public ip
NAT (Network Address Translation) can be configured at different points in a network, depending on the specific requirements and network architecture. It can be implemented at the customer end, ISP (Internet Service Provider) end, or both ends.
At the customer end, NAT is typically configured on devices such as routers or firewalls within the customer’s network. This allows the customer to control the translation of IP addresses for their internal network when communicating with external networks.
At the ISP end, NAT can be configured on devices such as carrier-grade NAT (CGN) routers within the ISP’s network. This allows the ISP to perform address translation for multiple customers, particularly in situations where public IPv4 addresses are limited.
In some cases, NAT may be configured at both the customer end and ISP end. This can occur when the customer has their own private network behind their router, and the ISP also performs NAT for their own purposes.
Ultimately, the decision on where to configure NAT depends on factors such as network design, security requirements, and the availability of public IP addresses.