Here is the final solution to make the cameras work on our Stormshield Firewall. Please note: I'm not very professional in firewall configs, trying to describe the problem and solution that I got explained from our firewallsupport as best as I can 😉 In the analysis of packets (Cisco Cams to Firewall and backwards) there were shown "Malformed Packets". The problem has seemed to be that all the cams were coming from same source port in our internal network. That was the reason why the traffic back to the cams was not able to be sent back to the right device. After using the marked function "random translated source port" for the camera-VLAN the problem was gone.   ... View more