AudioCodes Mediant 500L MSBR, Configuration Manual

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Configuration Guide 5. NAT and NAPT
Version 7.2 21 Security Setup
To access a specific port on an IP address on the inside network while using NAT, configure
port forwarding using the following configuration steps:
Table 5-6: NAT Port Forwarding Configuration
Command Description
# configure data
Enter the data configuration menu.
(config-data)# ip nat inside
source static <protocol> <inside
IP address> <inside port>
<outside interface> <outside
port>
Configures NAT port forwarding.

<protocol>: protocols (gre, ip, tcp, udp).

<inside IP address>: IP address of the
device on the inside.

<inside port>: port on the inside.

<outside interface>: physical interface to
witch the outside world is connected to.

<outside port>: port to which the users from
the outside connect to.
The device supports load balancing using NAT. If there are more than two servers on the
LAN side of the device, a connection to the WAN address can be forwarded to one of the
servers in a round-robin fashion. To configure load balancing, see the following table:
Table 5-7: Configuring NAT Load Balancing
Command Description
# configure data
Enter the data configuration menu.
(config-data)# ip nat pool <pool
name> <start address> <end
address> rotary
Configure the NAT pool.

<pool name>: NAT pool name. The <start
address> is the first IP to load balance
connections to.

<end address>: last IP to load balance
connections to.

rotary: activates the load balance feature
(config-data)# ip nat inside
destination <WAN IP> port <port>
pool <pool name>

<WAN IP>: outside address accessible from
the WAN side of the device.

<port>: port on the WAN side to which the
users connect. The same port is used to
access the servers on the inside.

<pool name>: NAT pool name configured
using the ip nat pool command.