Dell PowerConnect W-IAP3WN/P User Manual download pdf (Page 179)

179 | Roles and Policies Dell Networking W-Series Instant 6.4.0.2-4.1 | User Guide

Configuring Network Address Translation Rules

Network Address Translation (NAT) is the process of modifying network address information when packets pass

through a routing device. The routing device acts as an agent between the public (the Internet) and private (local

network), which allows translation of private network IP addresses to a public address space.

Instant supports the NAT mechanism to allow a routing device to use the translation tables to map the private

addresses into a single IP address and packets are sent from this address, so that they appear to originate from the

routing device. Similarly, if the packets are sent to the private IP address, the destination address is translated as

per the information stored in the translation tables of the routing device.

Configuring a Source NAT Access Rule

The source NAT action in access rules allows the user to override the routing profile entries. For example, when a

routing profile is configured to use 0.0.0.0/0, the client traffic in L3 mode access on an SSID destined to the

corporate network is sent to the tunnel. When an access rule is configured with Source NAT action, the users can

specify the service, protocol, or destination to which the source NAT is applied.

You can also configure source based routing to allow client traffic on one SSID to reach the Internet through the

corporate network, while the other SSID can be used as an alternate uplink. You can create an access rule to

perform source NAT by using the Instant UI or CLI.

In the Instant UI

To configure a source NAT access rule:

1. Navigate to the WLAN wizard or Wired settings window:

l To configure access rules for a WLANSSID, in the Network tab, click New to create a new network profile or

edit to modify an existing profile.

l To configure access rules for a wired profile, More > Wired. In the Wired window, click New under Wired

Networks to create a new network or click Edit to select an existing profile.

2. Click the Access tab.

3. To configure access rules for the network, slide to Network-based. To configure access rules for user roles,

slide to Role-based.

4. To create a new rule for the network, click New. To create an access rule for a user role, select the user role and

then click New. The New Rule window is displayed.

5. In the New Rule window:

6. Select Access control from the Rule type drop-down list.

7. Select Source-NAT from the Action drop-down list, to allow changes to the source IP address.

8. Select a service from the list of available services.

9. Select the required option from the Destination drop-down list.

10. If required, enable other parameters such as Log, Blacklist, Classify media, Disable scanning, DSCP tag, and

802.1p priority.

11. Click OK and then click Finish.

In the CLI

To configure source NAT access rule:

(Instant AP)(config)# wlan access-rule <access_rule>

(Instant AP)(Access Rule "<access_rule>")# rule <dest> <mask> <match> <protocol> <sport>

<eport> src-nat

(Instant AP)(Access Rule "<access_rule>")# end

(Instant AP)# commit apply

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Dell PowerConnect W-IAP3WN/P User Manual Page 179

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