Carrier grade NAT
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United States of America Patent
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Jan 23, 2018
Issued Date -
N/A
app pub date -
Apr 7, 2015
filing date -
Apr 7, 2014
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Abstract
Described herein are techniques for providing carrier grade dynamic network address translation (NAT). The disclosed techniques allow for dynamic switching from regular NAT to network address ports translation (NAPT) based on system load. Under the NAPT mode, the disclosed techniques allow the ports of a public IP address to be broken up into contiguous blocks of ports (e.g., of the same size and/or of varying size) such that each block can be assigned to an associated (e.g., different) private IP address. For each new connection from the private IP address, if the port used is the next port sequentially, the NAT device can store an offset from the starting public/private IP address ports. If the port is not the next port sequentially, the network address translation device can associate a new block of public ports to the private IP address.
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