FortiGate Administration Guide - FirewallShop.com

Firewall Virtual IP
Configuring virtual IPs
To add a server load balance virtual IP to a firewall policy
Add a external to dmz1 firewall policy that uses the virtual IP so that when users
on the Internet attempt to connect to the web server IP address packets pass
through the FortiGate unit from the external interface to the dmz1 interface. The
virtual IP translates the destination address of these packets from the external IP
to the dmz network IP addresses of the web servers.
1 Go to Firewall > Policy and select Create New.
2 Configure the firewall policy:
3 Select NAT.
4 Select OK.
Adding dynamic virtual IPs
Source Interface/Zone external
Source Address
All (or a more specific address)
Destination Interface/Zone dmz1
Destination Address Load_Bal_VIP_port_forward
Schedule
always
Service
HTTP
Action
ACCEPT
Adding a dynamic virtual IP is similar to adding a virtual IP. The difference is that
the External IP address must be set to 0.0.0.0 so the External IP address matches
any IP address.
To add a dynamic virtual IP
1 Go to Firewall > Virtual IP > Virtual IP.
2 Select Create New.
3 Enter a name for the dynamic 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.
Select any firewall interface or a VLAN subinterface.
5 Set the External IP Address to 0.0.0.0.
The 0.0.0.0 External IP Address matches any IP address.
6 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.
7 Select Port Forwarding.
8 For Protocol, select TCP.
9 Enter the External Service Port number for which 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).
FortiGate Version 3.0 MR5 Administration Guide
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