Network address translation

Network address translation

• 1.
  NETWORK ADDRESS TRANSLATION LETS SEEHOW OUR ADDRESSES ARE TRANSLATED
• 2.
  TODAY’S AGENDA • TheProblem:- IP Address Exhaustion. • The core solution. • NAT: What it does ? • How it works ? • Part of implementation. • Terminologies • Types of NAT. • Simulation • Advantages and Disadvantages
• 3.
  IP ADDRESS EXHAUSTION •Depletion of the pool of unallocated IPV4 address. • 4.2 billion addresses for 7 billion people on planet. How to deal with it ?
• 4.
  THE INTACT SOLUTIONS •Private network. • Virtual hosting. • Sub-netting. • Network Address Translation. • IPv6
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  N.A.T • Address translationalprotocol • Enables private IP networks that use unregistered IP addresses to connect to the Internet
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  PRIVATE AND PUBLICIP ADDRESSES CLASS PRIVATE ADDRESS PUBLIC ADDRESS CLASS A 10.0.0.0- 10.255.255.255 1.0.0.0- 9.255.255.255 11.0.0.0- 126.255.255.255 CLASS B 172.16.0.0- 172.31.255.255 128.0.0.0- 172.15.255.255 172.32.0.0- 191.255.255.255 CLASS C 192.168.0.0- 192.168.255.255 192.0.0.0- 192.167.255.255 192.169.0.0- 223.255.255.255
• 7.
  HOW NAT WORKS? • NAT allows a single device, such as a router, to act as an agent between the Internet or (public network) and a private network. • Which means: • Only a single unique IP address is required to represent an entire group of computers to anything outside their network
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  PART OF IMPLEMENTATION •Configured on Router. • Need of two interfaces of routers, Outside/Inside • Set of command instructions. • a set of rules for translating the IP addresses in the packet headers.
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  PRACTICAL LIFE IMPLEMENTATION • Enablingprivate IP addresses to communicate over Internet. • Merging two Networks, Using same IP addresses. • To connect multiple computers with internet through the Single Public IP address.
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  TERMINOLOGIES TERM DESCRIPTIO N Inside LocalIP Address Before translation source IP address located inside the network. Inside Global IP Address After translation IP address located outside the local network. Outside Global IP Address Before translation destination IP address located outside the
• 13.
  TYPES OF N.A.T •Static NAT • We manually map each inside local IP address with inside global IP address. • Since it uses one to one mapping we need exactly same number of IP address on both sides. • Dynamic NAT • We create a pool of inside global IP addresses. • Let the NAT device to map inside local IP address with the available outside global IP address from the pool automatically.
• 14.
  ADVANTAGES OF N.A.T •NAT solves IP overlapping issue. • NAT hides internal IP structure from external world. • NAT allows us to connect with any network without changing IP address. • NAT allows us to connect multiple computers with internet through the single the public IP address
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  DISADVANTAGES OF N.A.T •NAT adds additional delay in network. • Several applications are not compatible with NAT. • End to end IP traceability will not work with NAT. • NAT hides actual end device.
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  SIMULATION
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  THANK YOU