Shulou(Shulou.com)06/02 Report--

theory, thus

How it works: Network address translation

Implementation: 1. Static conversion

2. dynamic conversion

3. port multiplexing

There are 4 types of addresses: internal local addresses

external local address

inside global address

External Family Address

NAT translation entries: Simple translation entries (IP-based)

Extended translation entries (based on IP ports)

NAT Advantages: Save on sharing legitimate IP addresses

Handling address overlap

enhance flexibility

safety

NAT disadvantage: increased latency

Complexity of configuration and maintenance

Some applications are not supported and can be avoided by static NAT mapping

NAT Configuration Step 1: Interface IP Address Configuration

2: Use access control lists to define which internal hosts can do NAT

3: Decide what common address to use, static or pool

4: Specify address translation mapping

5: Enable NAT on internal and external ports

second instance

Based on IP address translation

As shown in the experimental topology diagram above, the address of the local area network host 192.168.10.10 is converted into the public network address 12.0.0.10, and 192.168.10.20 is converted into the public network address 12.0.0.20.

1 Configuration of three PCs

2 Configure switch R3, routers R1,R2

3 Testing Interconnection

4 do nat address translation

5 Test results

NAT static port mapping

Configure according to the above topology diagram

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.