Riverstone-networks WICT1-12 Manuel d'utilisateur télécharger pdf (Page 492)

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21-6 Riverstone Networks RS Switch Router User Guide Release 8.0

Configuration Examples Network Address Translation Configuration

Next, define the interfaces to be NAT “inside” or “outside”:

Then, define the NAT static rules:

Using Static NAT

Static NAT can be used when the local and global IP addresses are to be bound in a fixed manner. These bindings never

get removed nor time out until the static NAT command itself is negated. Static binding is recommended when you

have a need for a permanent type of binding.

The other use of static NAT is when the out to in traffic is the first to initialize a connection, i.e., the first packet is

coming from outside to inside. This could be the case when you have a server in the local network and clients located

remotely. Dynamic NAT would not work for this case as bindings are always created when an in to out Internet

connection occurs. A typical example is a web server inside the local network, which could be configured as follows:

This server, 10.1.1.2, is advertised as 192.50.20.2 to the external network.

nat set interface 10-net inside

nat set interface 192-net outside

nat create static protocol ip local-ip 10.1.1.2 global-ip 192.50.20.2

nat create static protocol tcp local-ip 10.1.1.2 global-ip 192.50.20.2 local-port 80

global-port 80

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