CCNA 200-301 Portable Command Guide, 5th Edition

Chapter 18. Network Address Translation (NAT)

This chapter provides information and commands concerning the following topics:

• Private IP addresses: RFC 1918

• Configuring dynamic NAT: One private to one public address translation

• Configuring PAT: Many private to one public address translation

• Configuring static NAT: One private to one permanent public address translation

• Verifying NAT and PAT configurations

• Troubleshooting NAT and PAT configurations

• Configuration example: PAT

Private IP Addresses: RFC 1918

Table 18-1 lists the address ranges as specified in RFC 1918 that anyone can use as internal private addresses. These will be your “inside-the-LAN” addresses that will have to be translated into public addresses that can be routed across ...