IPS not working - "Threat prevention requires topology to be defined"

[ngregory]

We have 2 x virtual AWS gateways, with IPS blade, but IPS does not seem to block anything although the policy does install.  We are on R80.30

[PhoneBoy]

R80.30 is End of Support this month…recommend upgrading to a supported release.
Have you configured the topology in your gateway object(s)?
Specifically have you assigned interfaces as Internal or External?

[AaronCP]

Looking at your second screenshot, your Access Control Policy is installing, but it looks like your IPS policy is not due to an issue with your topology. What does the output of ips stat show? Does it show an active profile?

[the_rock]

I believe @AaronCP is correct. Warning clearly indicated topology issue. Also, make sure that under ips setting on gateway properties, it shows "according to policy" and NOT detect only.