October 2014
Intermediate to advanced
300 pages
6h 24m
English
Content preview from LEARNING OPENSTACK NETWORKING (NEUTRON)Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Network Address Translation
Network Address Translation (NAT) is a networking concept that was developed in the early 1990s in response to the rapid depletion of IP addresses throughout the world. Prior to NAT, every host connected to the Internet had a unique IP address.
OpenStack routers support two types of NAT:
- one-to-one
- many-to-one
A one-to-one NAT is a method in which one IP address is directly mapped to another. Commonly referred to as a static NAT, a one-to-one NAT is often used to map a unique public address to a privately addressed host. Floating IPs utilize one-to-one NAT concepts.
A many-to-one NAT is a method in which multiple addresses are mapped to a single address. A many-to-one NAT employs the use of port address translation (PAT). ...
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