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218 01-28007-0068-20041203 Fortinet Inc.
Configuring virtual IPs Firewall
6 Enter the External IP Address that you want to map to an address on the destination
interface.
You can set the external IP address to the IP address of the external interface
selected in step 4 or to any other address.
For example, if the virtual IP provides access from the Internet to a server on your
internal network, the external IP address must be a static IP address obtained from
your ISP for this server. This address must be a unique address that is not used by
another host. However, this address must be routed to the external interface selected
in step 4. The virtual IP address and the external IP address can be on different
subnets.
7 Enter the External Service Port number for which you want to configure port
forwarding.
The external service port number must match the destination port of the packets to be
forwarded. For example, if the virtual IP provides access from the Internet to a web
server, the external service port number is 80 (the HTTP port).
8 Enter the Map to IP address to which to map the external IP address. For example,
the IP address of a web server on an internal network.
9 Enter the Map to Port number to be added to packets when they are forwarded.
If you do not want to translate the port, enter the same number as the External Service
Port.
10 Select OK.
To add a dynamic port forwarding virtual IP
1 Go to Firewall > Virtual IP.
2 Select Create New.
3 Enter a name for the dynamic port forwarding virtual IP.
4 Select the virtual IP External Interface from the list.
The external interface is connected to the source network and receives the packets to
be forwarded to the destination network.
You can select any firewall interface or a VLAN subinterface.
5 Select Port Forwarding.
6 Set the External IP Address to 0.0.0.0.
The 0.0.0.0 External IP Address matches any IP address.
7 Enter the External Service Port number for which you want to configure dynamic port
forwarding.
The external service port number must match the destination port of the packets to be
forwarded. For example, if the virtual IP provides PPTP passthrough access from the
Internet to a PPTP server, the external service port number should be 1723 (the PPTP
port).
8 Enter the Map to IP address to which to map the external IP address. For example,
the IP address of a PPTP server on an internal network.
9 Enter the Map to Port number to be added to packets when they are forwarded.
If you do not want to translate the port, enter the same number as the External Service
Port.