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IP address from defined network being blocked by the Firewall

I have been tasked to enabled the ENS Firewall on all our systems, and during some tests, I have noticed that IP addresses from one of a defined network were being blocked.
I have come across to KB87951, and I have found the solution somehow confusing (below). Does it mean that I can define a random IP as untrusted? Does anyone have an example?

Many thanks.

This behavior is expected. When you create a firewall rule where a local or remote network is specified as Defined Networks, make sure that at least one address is added as "Not Trusted" in Defined Networks in the Firewall Options policy if you intend the rule to not match all traffic and want it to match only specific addresses.

There is no firewall rule needed for addresses added as "Trusted" in Defined Networks because all incoming and outgoing traffic for these addresses is automatically trusted.

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Re: IP address from defined network being blocked by the Firewall

Hi @Linuxxo ,

Thank you for your post. If an IP address is defined as Trusted then it allows all IN & Out traffic for that host. In other words it doesn't follow any Firewall Rule.

Now lets say you have a list/range of IP's that you wish to match with specific firewall rules. These IP's can be defined as Untrusted. Later when creating a firewall rule it can be utilized in Remote or Local Network.


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Re: IP address from defined network being blocked by the Firewall

Hi Pravas,

Many thanks for your reply, I think I may have fixed it now since I have noticed in the FW logs that the networks are being trusted.


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