Hello misc@
I had a alpine 3.22 vmm virtual machine using a static ip NAT via
vport(4) & veb(4) and things were working fine. I did a routine
upgrade of the vm to 3.23 and networking broke. I can't ping or
traceroute anything from the virtual machine. Networking works on the
host. I can't ping the host from the vm. Is this a bug in the newer
linux kernels? or is this a mistake in my configuration? Any help would
be appreciated.
relevant information below:
```
~ $ cat /etc/pf.conf
set skip on lo
set block-policy drop
set optimization normal
# vmm NAT
match out on egress from vport0:network to any nat-to (egress)
# Allow VM traffic
pass in on veb0 inet from vport0:network nat-to (egress)
pass out on egress inet keep state
# Multicast junk
pass proto udp to 224.0.0.251 port mdns allow-opts
pass inet6 proto udp to ff02::fb port mdns allow-opts
pass proto udp to 239.255.255.250 port ssdp allow-opts
pass inet6 proto udp to { ff02::c, ff05::c, ff08::c } port ssdp
allow-opts
# ICMP
pass inet proto icmp
pass inet6 proto icmp6
```
```
~ $ cat /etc/hostname.veb0
add vport0
up
~ $ cat /etc/hostname.vport0
inet 172.16.100.1 255.255.255.0
up
```
```
~ $ cat /etc/vm.conf
switch "uplink" {
interface veb0
}
vm "alpine" {
disable
memory 768M
# cdrom "/tmp/alpine.iso"
disk "/home/izder456/VMs/Alpine.qcow2"
interface { switch "uplink" }
owner izder456
}
```
```
~ $ vmctl status
ID PID VCPUS MAXMEM CURMEM TTY OWNER STATE NAME
1 41429 1 772M 270M ttyp3 izder456 running alpine
```
`vmctl console alpine`:
```
alpine-vm:~# uname -a
Linux alpine-vm 6.17.12-0-stable #1-Alpine SMP PREEMPT_DYNAMIC
2025-12-12 18:38:41 x86_64 GNU/Linux
alpine-vm:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 172.16.100.2
netmask 255.255.255.0
gateway 172.16.100.1
alpine-vm:~# cat /etc/resolv.conf
search vlan
nameserver 9.9.9.9
alpine-vm:~# cat /etc/os-release
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.23.2
PRETTY_NAME="Alpine Linux v3.23"
HOME_URL="https://alpinelinux.org/";
BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues";
alpine-vm:~# ping 172.16.100.1
PING 172.16.100.1 (172.16.100.1): 56 data bytes
^C
--- 172.16.100.1 ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
alpine-vm:~# ping 9.9.9.9
PING 9.9.9.9 (9.9.9.9): 56 data bytes
^C
--- 9.9.9.9 ping statistics ---
1 packets transmitted, 0 packets received, 100% packet loss
alpine-vm:~#
```
--
iz (she/her)
> i like to say mundane things,
> there are too many uninteresting things
> that go unnoticed.
izder456 (dot) neocities (dot) org
