Network Address Translation Flashcards
NAT translates _____ _____ between interfaces
L3 adresses
What does NAT do?
changes source IP on outbund packets and destination ip on inbound packets
Nat devices is often on a border router
What is nat used for?
allowing internal hosts to have private IP addresses to share a public ip address to access the internet
direct internet originating traffic to a specific host (eg. public web server)
Additionally NAT provides one layer of _____________ to your network.
Security
What are the 3 types of NAT?
Static (one-to-one)
Dynamic (one-to-one and not commonly deployed)
Overloading (many-to-one
What is Static NAT?
Manually map IP to IP
What is dynamic NAT?
- Automatically map IP to IP
- Typically a pool of available address
What is Overloading NAT?
- Automatically map many IPs to one IP
- Uses ports to track individuals from many
What is an inside local NAT address?
Actual IP address assigned to an inside host
Typically private
What is an inside Global NAT Address?
Outside view IP address of inside host after translation
Typically address of router connected to ISP
What is an outside local nat address?
Inside vie IP address of outside host after translation
Only when NAT from outside to inside
What is outside global?
actual ip address assigned to outside host
What is the included in the Nat configuration process?
NAT processed from inside to outside or vice versa
Configure interfaces as inside or outside Configure any required access lists Configure NAT rule(s) required for processing
___________specifies allowed IP for NAT rule
access list
For overloading configuration you need a public __ _______ and a Nat rule
Public IP address
