Hi Friends,

I've written an article series, and two additional articles, that cover everything you need to know about Network Address Translation on the CCNA.

I wanted to share them for you all in one place:

Articles Series: pracnet.net/nat

• Network Address Translation

Two additional Articles:

• Cisco NAT Terminology
• Cisco IOS NAT Configuration

Specific topics covered in each article of the series:

• Why NAT?
  • RFC 1918
• NAT Terminology
  • NAT vs PAT
  • Static vs Dynamic
• Static NAT
  • Making Internal Resources Accessible
  • Source or Destination
  • Conserving IP Addresses
  • Bidirectional
• Static PAT
  • Multiple Servers using one Public IP Address
  • Non-Standard Ports
  • Response Traffic
  • Selectively Ppunching Holes (Port Forwarding)
• Dynamic PAT
  • Packet Flow - Outbound traffic
  • Packet Flow - Response traffic
  • Why was the source port re-randomized?
  • Undirectional
• Dynamic NAT
  • Illustration
  • Benefits and Use Cases for Dynamic NAT
  • Disadvantages of Dynamic NAT
• Policy NAT and Twice NAT
  • Summary of Types of NAT
  • Decision Criteria
  • Policy NAT
  • Twice NAT
  • Summary
• NAT Terminology Disambiguation

Specific topics covered in each of the individual articles:

• Cisco NAT Terminology
  • Inside Local, Inside Global, Outside Local, Outside Global

• Cisco IOS NAT Configuration
  • Designate Inside and Outside Interfaces
  • Static NAT
  • Static PAT
  • Dynamic PAT
  • Dynamic NAT
  • Configuration Syntax Summary

The articles are all free. There are no advertisements on the site. There is no mandatory e-mail capture. They are provided solely for the intent of helping you understand the knowledge required to pass the CCNA and be a top-performing Network Engineer =).

I hope these help you on your journey.

PS: Want something like the above for VLANs? If so, check out my other post on this sub reddit.

Edit: Thanks for the gold!