Messages

1

General Discussion / Static DHCP mapping for client with bonded interface.

« on: January 31, 2021, 12:17:17 am »

I am trying to configure the OPNSense DHCP server to send a fixed IP address to clients with bonded interfaces (multiple physical interfaces bonded in one virtual interface). The problem is that the bonded interface arbitrarily chooses the mac address of one of its underlying physical interfaces as its own mac address. This means that the mac address can change (and does change) each time the interface is rebooted. Thus, the static mapping in OPNSense cannot be based on a fixed MAC address for the client.

I have tried two things:

• Leave the mac address blank in the DHCP static map specification in OPNSense, and just set the client identifier. Have the client send that same identifier.
• Add a static map for all (four) physical mac addresses the bonding interface can take

Neither of these work. The OPNSense DHCP server doesn't seem to want to assign a static map based on client identifier. Only if I put a MAC address in there. In the second case, the UI rejects multiple static maps with different MAC addresses but the same IP.

I am curious if anyone has had the same issue and found a way to make it work. It seems like a limitation with DHCP itself, although it does seem like this is what the "client identifier" option is for.

2

General Discussion / Public IP addresses on LAN interface?

« on: January 30, 2021, 02:47:33 am »

I just started using opnsense (21.1). I am confused about the Top Talkers tab in Reporting -> Traffic. In the screenshot below there are many public ip addresses associated with the LAN interface, which has a single private subnet on it (192.168.100.0/24). Am I misinterpreting something?