What is the translation of the port address?

Port translation is a means for multiple devices in a private network to share a single public network address. It is a network device that modifies the incoming and outgoing internet logs (IP). The IP address and port number are changed and prevents public network in direct access to hosts on a private network. Port translation is used by network routers to share one public internet with all computers on the local network. This will keep the public addresses of IP instead of required one for each local computer that needs Internet access.

Both TCP Packets) and UDP DataGram Protocol (UDP) are translated by this process. Each packet contains the source IP address and the source port number. It also includes the IP target address and the target port number. Translation for ports, also known as PAT, creates a table that maps how it is used and port numbers, how they are used. This table stored in the Pat device, which may be a hardware routER, software firewall or similar devices.

When a computer in a local network sends a packet to a public network, the PAT device can change the header data. The actual source address is replaced by the IP address of the port of the port address. The new port number is assigned to the PAT device for connecting the source computer with the public network. The actual source port number in the header is then replaced by a newly assigned number. In this way, the outgoing packet is adjusted to appear as if it came directly from the PAT device.

For the outgoing packet, the translation table maintains a copy of the source address, the source port and the assigned port. The same port number can be used for each packet with this source address and port, simply making a table search. When the public network reacts, it is Will send packets to the IP address of the PAT address on the assigned port number. PAT facility then replaces this destination address real privateaddress from the search table. It will also replace the port number in the header headers with the actual port number from the table.

Metal address translation (NAT) is a related Mapping Method Method. The translation of the portion address is in fact a subset of NAT called overloaded NAT. PAT is sometimes referred to as NAT or translation of the network address port. There are NAT variants that map only IP addresses or only source addresses and source port numbers. Other forms map only target addresses and target port numbers or both types of ports and addresses.