module17-natV2

module17-natV2 - Network Address Translation (NAT) Relates...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Network Address Translation (NAT) Relates to Lab 7. Module about private networks and NAT.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Private Network Private IP network is an IP network that is not directly connected to the Internet IP addresses in a private network can be assigned arbitrarily. Not registered and not guaranteed to be globally unique Generally, private networks use addresses from the following experimental address ranges ( non-routable addresses ): 10.0.0.0 – 10.255.255.255 172.16.0.0 – 172.31.255.255 192.168.0.0 – 192.168.255.255
Background image of page 2
3 Private Addresses H1 R1 H2 10.0.1.3 10.0.1.1 10.0.1.2 H3 R2 H4 10.0.1.3 10.0.1.2 Private network 1 Internet H5 10.0.1.1 Private network 1 213.168.112.3 128.195.4.119 128.143.71.21
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Network Address Translation (NAT) NAT is a router function where IP addresses (and possibly port numbers) of IP datagrams are replaced at the boundary of a private network NAT is a method that enables hosts on private networks to communicate with hosts on the Internet NAT is run on routers that connect private networks to the public Internet, to replace the IP address-port pair of an IP packet with another IP address-port pair.
Background image of page 4
5 Basic operation of NAT NAT device has address translation table H1 private address: 10.0.1.2 public address: 128.143.71.21 H5 Private network Internet Source = 10.0.1.2 Destination = 213.168.112.3 Source = 128.143.71.21 Destination = 213.168.112.3 public address: 213.168.112.3 NAT device Source = 213.168.112.3 Destination = 128.143.71.21 Source = 213.168.112.3 Destination = 10.0.1.2 Private Address Public Address 10.0.1.2 128.143.71.21
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 Main uses of NAT Pooling of IP addresses Supporting migration between network service providers IP masquerading Load balancing of servers
Background image of page 6
Pooling of IP addresses Scenario: Corporate network has many hosts but only a small number of public IP addresses NAT solution: Corporate network is managed with a private address space NAT device, located at the boundary between the corporate network and the public Internet, manages a pool of public IP addresses
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 22

module17-natV2 - Network Address Translation (NAT) Relates...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online