No Webinterface after bridge activation

[SamBox83]

Hi everyone,
I am trying to setup OPNsense for my homelab but i seem to struggle to make a working network bridge. Since i am a total network beginner i don't really know what else to do so i hope someone here as an idea:

OPNsense is running on a Hyper-V machine with four network connections.
hn0 is my internet input from my ISP router
hn1 is my output from OPNsense to switch
hn2 is a virtual connection to other Hyper-V machines on the same server
hn3 is a output to a notebook

If i set hn0 as my WAN and hn1 as my LAN everything works. I can access the the Web GUI and DHCP gives out IPs in the range that i want.

Now what I want to do basically is to connect the virtual connection to my LAN. I just don't want an extra connection to the switch for my VMs since I don't want to create unnecessary traffic that could be handled right on the server.

My idea was to bridge hn2 and hn3 and set this bridge0 as my LAN interface. My thinking was that i can then access the Web GUI from the VMs or my Notebook and can add hn1 to the bridge, which was my actual goal.

I did everything as noted in https://docs.opnsense.org/manual/how-tos/lan_bridge.html but failed after step 3.
I lost the ability to connect to the Web GUI from any of the connections to do any more changes. And I don't really know why or where to look. I did the configuration straight after install so apart from the install wizard nothing was changed.

Am I doing something wrong, forgot something or is this just not how bridging works.
Thank you for any tips and tricks!

[FraLem]

Hi,

Once you have enabled your interfaces and the bridge, have you added firewall rules to these interfaces as well as to the bridge?

Rgds 

[SamBox83]

No, it was a clean install and i did not start to change any rules or anything else appart from the interfaces.
My understanding was that the rules are applied to interfaces and not to individual hardware so a change in assignment wont affect the rules and setup. Or am I wrong here?