Riverstone Networks WICT1-12 - Manual (Page 492)

21-6 Riverstone Networks RS Switch Router User Guide Release 8.0
Configuration Examples Network Address Translation Configuration
2. Next, define the interfaces to be NAT “inside” or “outside”:
3. 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