allow icmp type 3

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allow icmp type 3

L1 Bithead


How to configure policy to deny all icmp types, but only allow icmp type 3. Is it possible at all?



L4 Transporter

Have you tried making a custom App ID for this?  ICMP type 3 is not one of the App ID signatures in the native database, but it looks like it would be easy to create one.  I did it quickly and you can see it in the attached screen capture, but I haven't tested it.  Maybe you could give it a shot!

To create a custom App ID, go to Objects tab > Applications > Click the "New" button.  Give it a name and description in the "Configuration" tab, and then in the "Advanced" tab, you can choose your ICMP type.

Once you have a custom App ID, you could create a security policy to allow this application.

Yes, I've done it. But little bit strange that sometimes also other applications are matching this rule then. In example ftp. May-be ftp uses icmp type 3  in some part of making connection?


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