2024年7月16日发(作者：章佳闲丽)
三元组nat原理
Network Address Translation (NAT) is a technology that
enables routers to translate IP addresses between two different
networks. NAT allows one public IP address to be used by
multiple private IP addresses. It is a way of conserving IP
addresses in a limited pool allocated by the Internet Assigned
Numbers Authority (IANA). By translating the private IP
addresses to a single public IP address, NAT eliminates the need
for individual public IP addresses for each device on the
private network. NAT also provides additional security by hiding
the internal IP addresses from external networks.
NAT works by translating IP addresses in packets of data as
they enter and leave a network. When a packet of data leaves the
private network, it is replaced by the public IP address of the
router. When the packet returns to the private network, it is
replaced by the internal IP address of the device that sent the
packet. This IP address translation occurs for every packet that
enters or leaves the private network.
When a packet of data leaves the private network, the source
IP address is replaced by the router’s public IP address.
Similarly, when a packet of data arrives from the public network,
the destination IP address is replaced by the internal IP
address of the destination device. This is known as the “NAT
Trio” which consists of the internal source address, the
router’s public IP address, and the internal destination
address.
There are several advantages to using NAT. Firstly, it helps
conserve the limited global pool of IP addresses. By using a
single public IP address for multiple private IP addresses, it
reduces the need for additional IP addresses. Secondly, NAT
provides additional security since it hides the internal IP
addresses from external networks. Finally, NAT reduces the
amount of administrative overhead required to manage multiple
public IP addresses.
2024年7月16日发(作者：章佳闲丽)
三元组nat原理
Network Address Translation (NAT) is a technology that
enables routers to translate IP addresses between two different
networks. NAT allows one public IP address to be used by
multiple private IP addresses. It is a way of conserving IP
addresses in a limited pool allocated by the Internet Assigned
Numbers Authority (IANA). By translating the private IP
addresses to a single public IP address, NAT eliminates the need
for individual public IP addresses for each device on the
private network. NAT also provides additional security by hiding
the internal IP addresses from external networks.
NAT works by translating IP addresses in packets of data as
they enter and leave a network. When a packet of data leaves the
private network, it is replaced by the public IP address of the
router. When the packet returns to the private network, it is
replaced by the internal IP address of the device that sent the
packet. This IP address translation occurs for every packet that
enters or leaves the private network.
When a packet of data leaves the private network, the source
IP address is replaced by the router’s public IP address.
Similarly, when a packet of data arrives from the public network,
the destination IP address is replaced by the internal IP
address of the destination device. This is known as the “NAT
Trio” which consists of the internal source address, the
router’s public IP address, and the internal destination
address.
There are several advantages to using NAT. Firstly, it helps
conserve the limited global pool of IP addresses. By using a
single public IP address for multiple private IP addresses, it
reduces the need for additional IP addresses. Secondly, NAT
provides additional security since it hides the internal IP
addresses from external networks. Finally, NAT reduces the
amount of administrative overhead required to manage multiple
public IP addresses.