Download network address translation

Show related SlideShares at end. WordPress Shortcode. Share Email. Top clipped slide. Download Now Download Download to read offline. Network address translation Sep. Network Address Translation, Types. Varsha Honde Follow. Network address translation. Nat presentation. Network address translation pdf. Ip address. Internet protocol ip ppt. Ip addressing classful. Related Books Free with a 30 day trial from Scribd.

NAT inside and outside addresses — Inside refers to the addresses which must be translated. Outside refers to the addresses which are not in control of an organization. These are the network Addresses in which the translation of the addresses will be done.

Skip to content. Change Language. Related Articles. Computer Network Fundamentals. Physical layer. Data Link layer. Network layer. Transport layer. In this manner the internet network address and port number of the sender is not exposed to other hosts on the public Internet.

To keep track of the network address translations for all active connections between local and external networks, the NetX Duo NAT-enabled router maintains a translation table with information about each private host connection which includes source and destination IP address and port number.

This area must be a 4 byte aligned buffer space. The default value is 3. The default value is 4 minutes or system ticks for a mHz processor as recommended by RFC To create inbound entries as static in the table e. If a table entry defines the local host connection as static, it never expires. This service is described in more detail in Chapter 4 - Description of Services.

See Chapter 4 - Description of Services for more details about this service. If the translation table does not contain an entry for a packet previously sent by this host for the same destination, NAT will create a new entry which will contain a unique global source IP address:port for the connection, and modify the packet headers with this new IP address:port before sending it onto the external network.

For inbound packets, the NAT server looks for a previous entry in its translation table with an external IP address: port matching the packet destination IP address: port. If no match is found, it will discard the packet unless the destination address: port is the external address for server on the local network. The NAT application requires creation of a single IP instance and an interface to the internal and external physical network.

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