Fortinet 400 Virtual IPs

188 Fortinet Inc.

Virtual IPs Firewall configuration

After you have created schedules, you can add them to policies to schedule when the

policies are active. You can add the new schedules to policies when you create the

policy, or you can edit existing policies and add a new schedule to them.

1Go to Firewall > Policy.

2Select the tab corresponding to the type of policy to add.

3Select New to add a policy or select Edit to edit a policy to change its schedule.

4Configure the policy as required.

5Add a schedule by selecting it from the Schedule list.

6Select OK to save the policy.

7Arrange the policy in the policy list to have the effect that you expect.

For example, to use a one-time schedule to deny access to a policy, add a policy that

matches the policy to be denied in every way. Choose the one-time schedule that you

added and set Action to DENY. Then place the policy containing the one-time

schedule in the policy list above the policy to be denied.

Virtual IPs

Use virtual IPs to access IP addresses on a destination network that are hidden from

the source network by NAT security policies. To allow connections between these

networks, you must create a mapping between an address on the source network and

the real address on the destination network. This mapping is called a virtual IP.

For example, if the computer hosting your web server is located on the network

connected to port3, it could have a private IP address such as 10.10.10.3. If port2

connects to the Internet, to get packets from the Internet to the web server, you must

have an external address for the web server on the Internet. You must then add a

virtual IP to the firewall that maps the external IP address of the web server to the

actual address of the web server on the port3 network. To allow connections from the

Internet to the web server, you must then add a port2->port3 firewall policy and set

Destination to the virtual IP.

You can create two types of virtual IPs:

Static NAT Used in to translate an address on a source network to a hidden address on

a destination network. Static NAT translates the source address of return

packets to the address on the source network.

Port Forwarding Used to translate an address and a port number on a source network to a

hidden address and, optionally, a different port number on a destination

network. Using port forwarding you can also route packets with a specific

port number and a destination address that matches the IP address of the

interface that receives the packets. This technique is called port forwarding

or port address translation (PAT). You can also use port forwarding to change

the destination port of the forwarded packets.