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How To Add ISDB In Fortigate Firewall Policy

Here in this article let us understand how to add ISDB in fortigate firewall policy in place of destination to allow traffic for that destination ISDB.

ISDB:ISDB means internet service database which consists of many IP address that domain consists. Fortigate firewall will have many ISDB, like google DNS, amazon which will consists of all of their IP address.


Here the requirement is to allow only google IP address for single IP “”, in this scenario you can configure a firewall policy with source IP “” and in the destination keep “all google” ISDB

Under policy and objects >> create new firewall policy

In place of source: Select that source IP

In place of destination: Select all google ISDB in internet service field

In place of NAT: Enable NAT

Action: Accept

Screenshot for your reference:

google isdb

Now this machine IP will be able to access only google services through this firewall rule.

Hope this article helps you.