NAT (NAT Overload/PAT, Port Forwarding)
Overview
Every LAN design is used by Private IP address. So LAN cannot access to outside or Internet. by allowing every LAN
to reach the outside network with unspecific network or Internet, we need best solution with NAT. NAT is one of
technology use for translate Private IP to Public IP and backward. There are many type of NAT:
Static NAT – Use to translate 1 private IP to 1 public IP. (Ex: suppose that you have only 1 public IP address and
backward, so there is only one host can access to Internet at the same session.)
Dynamic NAT – Use to translate many private IP to many public IP. (Ex: suppose that you have 3 public IP address,
so there are only 3 hosts can access to Internet at the same current session. If one of 3 hosts was disconnect from
Internet, the 4th host can access to Internet.)
NAT Overload/PAT – Use to translate all private IP address to 1 public IP address and backward. (Ex: suppose we
have only 1 public IP address, so all hosts can access to internet)
Port Forwarding – It similar to static NAT, but it was added layer port. Port Forwarding usually use to allowing outside
to access inside host. (Ex: suppose we have internal web sever to hosting for outside accessing, so we have to
configure port forwarding.)
Topology
Click here to download topology of NAT (NAT Overload/PAT, Port Forwarding).pkt
Subscribe to:
Post Comments (Atom)
EmoticonEmoticon