Hello, In my machine (4.19.0-5-amd64 #1 SMP Debian 4.19.37-5 (2019-06-19) x86_64 GNU/Linux) I've setup a bridge with systemd-networkd.
I've then setup a systemd-nspawn container and some virtual machines with
qemu/virt-manager (Debian and Windows10 guest).
The problem I'm encountering is that in all guests (Debian and Windows, DHCP or
static IP configurations) I'm never able to ping the host system. From the host
I'm instead able to ping the guest.
In the guests everything else seems to work and I'm able to reach the internet
as expected.
Can someone kindly give me some hint on how to solve this issue?
I really don't know if it's related to systemd-networkd, Debian, iptables...
I'm therefore posting here this question, but I'm open to suggestions for a
more appropriate place to ask for assistance...
The configuration files are:
`/etc/systemd/network/br0.netdev`:
[NetDev]
Name=br0
Kind=bridge
MACAddress=08:60:6e:d6:4d:7b
`/etc/systemd/network/br0.network`:
[Match]
Name=en*
[Network]
Bridge=br0
`/etc/systemd/network/20-wired.network`:
[Match]
Name=br0
[Network]
DNS=172.17.0.10
DNS=172.17.0.20
[Address]
Address=172.17.1.48/16
[Route]
Gateway=172.17.0.1
`ip a` on the host:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master
br0 state UP group default qlen 1000
link/ether 08:60:6e:d6:4d:7b brd ff:ff:ff:ff:ff:ff
inet6 fe80::a60:6eff:fed6:4d7b/64 scope link
valid_lft forever preferred_lft forever
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group
default qlen 1000
link/ether 08:60:6e:d6:4d:7b brd ff:ff:ff:ff:ff:ff
inet 172.17.1.48/16 brd 172.17.255.255 scope global br0
valid_lft forever preferred_lft forever
inet6 fe80::a60:6eff:fed6:4d7b/64 scope link
valid_lft forever preferred_lft forever
6: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master
br0 state UNKNOWN group default qlen 1000
link/ether fe:54:00:9c:89:fa brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe9c:89fa/64 scope link
valid_lft forever preferred_lft forever
7: vb-sidcontaine@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
master br0 state UP group default qlen 1000
link/ether da:a4:31:ec:1e:57 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::d8a4:31ff:feec:1e57/64 scope link
valid_lft forever preferred_lft forever
`brctl show` on the host:
bridge name bridge id STP enabled interfaces
br0 8000.08606ed64d7b no enp3s0
vb-sidcontaine
vnet0
with vb-sidcontainer = systemd-nspawn container
vnet0 = qemu VM
Peace,
--
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