GRE traffic blocked by

[Zugschlus]

Hi,

I have OPNsense 25.7.8. To keep legacy telephones running, I have a number of GRE tunnels that terminate on devices that are behind OpenVPN on the remote side, and on a system in my internal network. The traffic from the internal network to the OpenVPN link is blocked by the built-in "Default deny / state violation rule":

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I have both a bidirectional floating rule without state tracking:

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and corresponding directional rules in both the OpenVPN and the internal rule list.

The traffic is still blocked.

How can I get that GRE traffic to pass?

Greetings
Marc