FreeBSD VM networking in Incus

Incus
,
1

I set up a FreeBSD VM in Incus by attaching the ISO and installing it on the attached root device. It seems to work pretty well, except when it comes to networking: vtnet0 shows up as expected but I can’t get DHCP to work on the “regular” incusbr0 even though the device seems up, but it works fine if I instead attach the VM to a macvlan network, the VM then gets an IP from the parent (hardware) router of the Incus host.

Any thoughts on what might be causing this, and if there is a way to get it to work against the Incus bridge network?

I have other VMs (not BSD) running in the same network that do get IPs over DHCP, so it’s not that the network is broken at least.

2

Most likely some firewalling going on.

3

Maybe, but there’s no nft rules on the host set by me, just incus stuff:

# nft list ruleset | grep chain
        chain pstrt.incusbr0 {
        chain fwd.incusbr0 {
        chain in.incusbr0 {
        chain out.incusbr0 {
        chain fwdprert.incusbr0 {
        chain fwdout.incusbr0 {
        chain fwdpstrt.incusbr0 {
        chain pstrt.incusbr1 {
        chain fwd.incusbr1 {
        chain in.incusbr1 {
        chain out.incusbr1 {

# incus network acl list
+------+-------------+---------+
| NAME | DESCRIPTION | USED BY |
+------+-------------+---------+

# incus network show incusbr0
(...)
config:
  ipv4.address: 10.122.20.1/24
  ipv4.nat: "true"
  ipv6.address: none
description: ""
name: incusbr0
type: bridge
(...)

And as I mentioned, there’s another VIRTUAL-MACHINE attached to the same network that gets a 10-ip just fine, only difference is that it runs Alpine, so I think it’s something BSD specific that happens here.

FreeBSD has no firewall running, as I believe is the default

# grep -i firewall /etc/rc.conf
# pfctl -s info
pfctl: /dev/pf: No such file or directory
4

Could be the UDP checksum issue raising its head again. See this recent thread: No IPV4 address for freebsd vm - #6 by candlerb