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Barracuda CloudGen Firewall

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How to Create NAT Tables (Translation Maps)

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NAT Table are a expanded type of source NAT for a network or IP address range. The NAT Tables connection object rewrites the source IP address to a source NAT IP address range. To rewrite both the destination and the source address of the connection, you can choose to use a NAT Table connection object with a MAP firewall rule. You can enter multiple rewriting maps that are are processed from the top to the bottom. The first matching rewrite map is used.


Create a NAT Table Connection Object

  1. Go to CONFIGURATION > Configuration Tree > Box > Virtual Servers > your virtual server > Assigned Services > Firewall > Forwarding Rules.
  2. From the left menu, click Connections.
  3. Click Lock.
  4. Right-click the table and select New >NAT Table.
  5. Enter a Name for the NAT Table.

    If you want to use this NAT Table in a firewall rule, select this name from the Connection list in the firewall rule settings.

  6. In the Original Address/Net/Range field, enter the source IP range or network.
  7. In the Translated Address field, enter the network that you want the source IP address or network to be rewritten to.
  8. Unless the destination network is connected by a Layer 2 bridge to the source network, select the Proxy ARP check box.
  9. Click New to add the addresses to the list.  
  10. Click OK.
  11. Click Send Changes and Activate.

Apply the NAT Table to a Firewall Rule

To apply a NAT Table object to a firewall rule, select the object from the Connection list in the firewall rule settings.


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