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13 Cards in this Set

  • Front
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NAT: Define "inside local" and "inside global"
Inside local = internal (private) IP address on the inside network;
Inside global = public IP address which is translated to/from inside-local
NAT: Define "outside local" and "outside global"
Outside local = Ip address of the outside host within the local network;
Outside global = ip address of the outside host on the outside network
NAT: Define "static NAT"
Translations are permanent, one-to-one
NAT: Define "dynamic NAT"
1. Pool of inside global IP addresses
2. Translations are dynamic with timeout or clear CLI
3. If pool is exhaused, router discards packets needing translation but not in pool
NAT: Define "Port Address Translation"
1. also known as NAT/Overload
2. Includes port numbers for both inside/outside.
NAT: Can it translate the global (outside) address?
Yes, but this is infrequent
NAT: CLI commands to configure static NAT
1. interface(s): ip nat inside
2. interface: ip nat outside
3. global: ip nat inside source static <inside local> <inside global>
NAT: CLI commands to configure dynamic NAT
1. #ip nat inside
2. #ip nat outside
3. global: #access-list 1 permit <ip-address> <wildcard mask>
4. global: #ip nat pool <name> <first-ip> <last-ip> netmask <netmask>
5. global: #ip nat inside source list <acl number|name> pool <name>
NAT: CLI commands to verify and debug
1. #show ip nat translations
2. #clear ip nat translation *
3. #debug ip nat
NAT: CLI commands to configure NAT overload/PAT
Two variations
1. Add overload keyword to end of the ip nat inside source list command
2. Follow steps for dynamic nat, but don't create a pool.
Then: #ip nat inside source list <acl number|name> interface <int> overload
NAT: CLI command to setup NAT pool
global: #ip nat pool <name> <first-ip> <last-ip> netmask <mask>
NAT: CLI command to map an access list to a pool
global: #ip nat inside source list <name|number> pool <name> [overload]
NAT: CLI to create dynamic nat w/o creating pool
#ip nat inside source list <number|name> interface <int> overload