Bridge Not Forwarding ARP

[Dan Lists]

I am not running virtualbox.   I am still searching for clues to fix this
problem.

On Mon, Jul 8, 2019 at 7:54 PM Joseph Ward <jbwlists at hilltopgroup.com>
wrote:

> I had this exact issue while virtualbox had a guest network adapter
> bridged to the external interface that the FreeBDS bridge0 interface was
> bridged to.  If I shutdown the VMs, ARP magically started working
> bidirectionally, and after restarting the VMs it failed again.
>
> My fix was eventually to just have 2 external NICs; one exclusively for
> the virtualbox systems.  I have no idea if you have a virtualbox guest
> present, but if so that was my fix.
>
> The issue occurred on both igb and re NICs.
>
> -Joseph
>
> On 2019-07-08 12:13, Dan Lists wrote:
> > I have a server running FreeBSD 11.2 that I am wanting to use as a
> bridged
> > firewall.  I have it set up and it mostly works.   The problem is that
> ARP
> > replies are not being forwarded from the outside interface to the inside
> > interface.   It appears to be working in the other direction.  I see the
> > ARP request go out on the outside interface and the reply arrives back at
> > the outside interface.   The ARP reply is never getting to the bridge or
> to
> > the inside interface.
> >
> > The firewall server and the device behind it are in ESX.   I think I've
> > worked all the ESX issues out.  When I manually add an ARP entry
> everything
> > works.   I've done this before with a physical server running FreeBSD 8.4
> > and it works as expected.   The differences are physical vs virtual, and
> > 8.4 vs 11.2.
> >
> > I'm at a loss as to why it is not working.   I've searched the web and
> > found noting.  If anyone could offer suggestions on how to fix this or
> > begin to debug it I would greatly appreciate it.
> >
> > Thanks,
> >
> > Dan
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