Casio ISA550WBUN3K9 manual Configuring Port Forwarding Rules, Click Firewall NAT Port Forwarding

Firewall	6
Configuring NAT Rules to Securely Access a Remote Network

STEP 5 Click Save to apply your settings.

Configuring Port Forwarding Rules

Port forwarding forwards a TCP/IP packet traversing a Network Address Translation (NAT) gateway to a pre-determined network port on a host within a NAT-masqueraded network, typically a private network based on the port number on which it was received at the gateway from the originating host.

Use the Port Forwarding page to assign a port number to a service that is associated with the application that you want to run, such as web servers, FTP servers, email servers, or other specialized Internet applications.

NOTE

•Up to 64 port forwarding rules can be configured on the security appliance. You must create firewall rules to allow access so that the port forwarding rules can function properly.

•To open an internal FTP server to the Internet, make sure that the FTP server is listening on TCP port 21 or both the FTP server and client must use the active mode when the FTP server is listening on some other TCP port. Otherwise the FTP client cannot access the FTP server.

STEP 1 Click Firewall > NAT > Port Forwarding.

STEP 2 To enable a port forwarding rule, check the box in the Enable column.

STEP 3 To add a port forwarding rule, click Add.

Other options: To edit an entry, click the Edit (pencil) icon. To delete an entry, click the Delete (x) icon. To delete multiple entries, check them and click Delete.

The Port Forwarding Rule - Add/Edit window opens.

STEP 4 Enter the following information:

•Original Service: Choose an existing service as the incoming service.

•Translated Service: Choose a service as the translated service or choose Original if the translated service is same as the incoming service. If the service that you want is not in the list, choose Create a new service to create a new service object. To maintain the service objects, go to the Networking > Service Management page. See Service Management, page177.

Cisco ISA500 Series Integrated Security Appliances Administration Guide 266