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I've reinstalled OPNsense from the scratch - without import configuration and with manually recreate the network configuration.

Now everything is working as expected. But have have to rebuild all the filtering rules yet.
I will compare the configuration - maybe I find the issue....

[EDIT]

I don't have a far gateway.

The management port igb2 is in the same network as the LAN ports of the internet router.
And the router is the gateway to the internet, its WAN port has a public IP of the ISP.

I've attached a simple network diagram for better understanding.

EDIT: OPNsense is operating in filtering bridge mode.

[Does anyone have ideas what causes the problem or how I can pinpoint the root cause?]

I recently test the upgrade from 22.7.11 to 23.1
But then in my setup I will be unable to access the WebUI and on the Console I get the following errors on the management interface port every time I tried to access the WebUI:

Code Select Expand


arpresolve: can't allocate llinfo for 192.168.xx.xx on igb2


My setup is:

• OPNsense is working in bridge mode (igb0<->igb2)
• igb0 is the incoming interface from routers WAN port
• igb1 is the outgoing interface to the internet providers modem port
• igb2 is the management interface, connected to on of the routers local network ports (i.e. for WebUI access)
• I have not set any dev tunables like mentioned at https://www.reddit.com/r/NixOS/comments/10107km/how_to_delete_old_generations_on_nixos/ or https://forum.opnsense.org/index.php?topic=32017.15
• igb2 receives its ip address via DHCP as client from the router. I spotted some (maybe leftover) DHCP configuration for this igb2 interface. Could that be the problem?
• there are some load balancer settings in the XML. No idea if these interfere or cause problems

I have my current configuration (stripped by the sensible informations) attached.

Does anyone have ideas what causes the problem
or how I can pinpoint the root cause?

[How can I offline Upgrade my 22.7.11 to the latest 23.1.x without having a working internet connection?]

Recently I updated via WebUpdater from 22.7.11 to 23.1.
But with 23.1 I'm experiencing major issues that are rendering the management interface (WebUI, Connection to router/internet) unusable - with 23.1 I have no working internet connection at all.

arpresolve: can't allocate llinfo for 192.168.xx.xx on igb2

Therefor once I upgraded to 23.1 I'm unable to perform further upgrades within the 23.1.x upgrade path.

I learned that the official download mirrors only provide installer images for version 23.1, but not for die minor (bugfix) updates 23.1.x. Is that true? Or I do missing something?

How can I offline Upgrade my 22.7.11 to the latest 23.1.x without having a working internet connection?
Does anyone have ideas or the solution?

P.S.: Clean install of 23.1 with importing my recent 22.7.11 configuration results in the same errror state mentioned above.