NAT

Question 1

Command to create a static NAT mapping

Answer 1

ip nat inside source static inside local inside global

Question 2

Command to see static NAT mappings

Answer 2

show ip nat translations

Question 3

5 steps to configuring dynamic NAT

Answer 3

1. Set an interface to inside
2. Set an interface to outside
3. Create ACL for the inside interface which identifies packets for which NAT should be performed
4. Create a pool of global IP’s for use in NAT
5. Bind the ACL and the pool together, enabling dynamic NAT

Question 4

Command to create an IP address pool for use with NAT

Answer 4

ip nat pool name first IP last IP netmask subnet mask

Question 5

Command to bind pool and ACL together to enable dynamic NAT

Answer 5

ip nat inside source list ACL # pool pool name

Question 6

Command to clear the NAT translation table

Answer 6

clear ip nat translation *

Question 7

2 variations to enable PAT

Answer 7

ip nat inside source list ACL # interface interface overload
ip nat inside source list ACL # pool pool name overload

Question 8

What does “inside local” refer to?

Answer 8

Private IP’s used in NAT

Question 9

What does “inside global” refer to?

Answer 9

Public IP’s used in NAT

Question 10

3 steps to configure a router to do static NAT

Answer 10

1. Set up an interface as inside local
2. Set up an interface as inside global
3. Create a mapping between inside and outside IP’s

Question 11

Command to make an inside NAT interface

Answer 11

conf t
int gi0/0
ip nat inside

Question 12

Command to make an outside NAT interface

Answer 12

conf t
int gi0/1
ip nat outside

Question 13

Command to set a static translation

Answer 13

ip nat inside source static inside local IP inside global IP

Question 14

Command to set an inside local interface

Answer 14

conf t
interface interface
ip nat inside

Question 15

Command to set an inside global interface

Answer 15

conf t
interface interface
ip nat outside