Failed to start websocket connection

[hungnt]

I changed from PFsense to OPN by hardware issue.
I'm having a problem where OPNsense is blocking connections related to WebSocket. As shown in the picture, from the "Jenkin agent" server, it will not be possible to connect to the "Jenkin master" server. Both of these servers are on different LAN and there is a allow all rule in both.

I also checked the Firewall log but there is no deny log.

I also tried turning off OPNsense and using PFsense (without installing anything else), I can still connect normally.

I wonder if anyone has encountered this problem or can teach me more ways to check the error.

[hungnt]

update LAN SERVER rule

[hungnt]

update LAN DMZ rule