i setup a explicit rule for the motioneye application to be allowed to send from DMZ 192.168.200.7 port 8765 to green 192.168.100.2.
But when i call the web interface 192.168.200.7:8765 from green i see only part of the gui, the login dialog is missing and the application complains about an error that occured.
Ah, sorry, my misunderstanding. I thought you were talking about the problem being seen on the IPFire web gui.
Regarding this log entry, a NEW NOT SYN message means that it was a new communication from orange to green but did not have the syn bit set and therefore was not part of an ongoing communication from green to orange.
When you still get these messages when you have set up a rule to allow that orange ip on that port to connect to the specified green ip, then it suggests that there is a problem with the rule you have setup.
Can you show the rule that you have setup in the firewall?
That looks like it should be okay. I have other ports and services working from Orange to Green in a similar way on my system and I am not seeing the NEWNOTSYN messages.
I am afraid I don’t have any further ideas on what could be causing the problem.