Unable to connect form docker container to docker container inside a CT

[hlcus]

Hello all,
i've a advance problem to connect form docker container to docker container inside a CT.

Setup:
Vlan 1 - only for working stations
Vlan 2 - only for docker container
Vlan 3 - only for testing
CT with docker server and portainer inside VLan 2 (IP xx.xx.10.10)
docker container inside VLan 2 (IP xx.xx.10.20)
docker container inside VLan 3 (IP xx.xx.20.20)
Laptop inside VLan 1 (IP xx.xx.0.10)

Turn off Firewall on:
promox instance
node instance
container instance

What is working:
Access Laptop (IP xx.xx.0.10) to docker server inside VLan 2 (IP xx.xx.10.10)
Access Laptop (IP xx.xx.0.10) to docker container inside VLan 2 (IP xx.xx.10.20)
Access Laptop (IP xx.xx.0.10) to docker container inside VLan 3 (IP xx.xx.20.20)
Access docker container inside VLan 3 (IP xx.xx.20.20) to docker container inside VLan 2 (IP xx.xx.10.20)

What is not working:
ping Laptop (IP xx.xx.0.10) to docker server inside VLan 2 (IP xx.xx.10.10)
ping Laptop (IP xx.xx.0.10) to docker container inside VLan 2 (IP xx.xx.10.20)
ping docker server inside VLan 2 (IP xx.xx.10.10) to docker container inside VLan 2 (IP xx.xx.10.20)
access docker server inside VLan 2 (IP xx.xx.10.10) to docker container inside VLan 2 (IP xx.xx.10.20)

I propose, there is a firewall problem.