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IP pools
Firewall configuration
5
Select OK to save the IP pool.
Figure 14: Adding an IP Pool
IP Pools for firewall policies that use fixed ports
Some network configurations will not operate correctly if a NAT policy translates the
source port of packets used by the connection. NAT translates source ports to keep
track of connections for a particular service. You can select fixed port for NAT policies
to prevent source port translation. However, selecting fixed port means that only one
connection can be supported through the firewall for this service. To be able to support
multiple connections, you can add an IP pool to the destination interface, and then
select Dynamic P pool in the policy. The firewall randomly selects an IP address from
the IP pool and assigns it to each connection. In this case the number of connections
that the firewall can support is limited by the number of IP addresses in the IP pool.
IP pools and dynamic NAT
You can use IP pools for dynamic NAT. For example, your organization may have
purchased a range of Internet addresses, but you may have only one Internet
connection: the external interface of your FortiGate unit.
You can assign one of your organization’s Internet IP addresses to the external
interface of your FortiGate unit. If your FortiGate unit is operating in NAT/Route mode,
all connections from your network to the Internet appear to come from this IP address.
If you want connections to originate from all of your Internet IP addresses, you can
add this address range to an IP pool for the external interface. Then you can select
Dynamic IP Pool for all policies with the external interface as the destination. For each
connection the firewall dynamically selects an IP address from the IP pool to be the
source address for the connection. As a result connections to the Internet will appear
to be originating from all of the IP addresses in the IP pool.
Summary of Contents for FortiGate 50R
Page 16: ...16 Fortinet Inc Customer service and technical support Introduction ...
Page 32: ...32 Fortinet Inc Next steps Getting started ...
Page 40: ...40 Fortinet Inc Completing the configuration NAT Route mode installation ...
Page 112: ...112 Fortinet Inc Customizing replacement messages System configuration ...
Page 144: ...144 Fortinet Inc Content profiles Firewall configuration ...
Page 202: ...202 Fortinet Inc Logging attacks Network Intrusion Detection System NIDS ...
Page 216: ...216 Fortinet Inc Exempt URL list Web filtering ...
Page 228: ...228 Fortinet Inc Configuring alert email Logging and reporting ...
Page 232: ...232 Fortinet Inc Glossary ...