Networking suddenly broken

LXD
,
1

I created a bridge with lxd init and it worked fine till this boot.

I followed this article: LXC containers cannot ping outside world "network is unreachable" - #9 by JoeyFaulkner
I had the same situation up to:
ps aux | grep dnsmasq
lxd 980 0.0 0.0 7212 2736 ? Ss 18:44 0:00 dnsmasq --keep-in-foreground --strict-order --bind-interfaces --except-interface=lo --pid-file= --no-ping --interface=lxdbr0 --dhcp-rapid-commit --quiet-dhcp --quiet-dhcp6 --quiet-ra --listen-address=10.47.169.1 --dhcp-no-override --dhcp-authoritative --dhcp-leasefile=/var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.leases --dhcp-hostsfile=/var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.hosts --dhcp-range 10.47.169.2,10.47.169.254,1h --listen-address=fd42:80cb:e771:44ae::1 --enable-ra --dhcp-range ::,constructor:lxdbr0,ra-stateless,ra-names -s lxd --interface-name _gateway.lxd,lxdbr0 -S /lxd/ --conf-file=/var/snap/lxd/common/lxd/networks/lxdbr0/dnsmasq.raw -u lxd -g lxd nicopwn 3995 0.0 0.0 6492 2492 pts/4 S+ 20:37 0:00 grep dnsmasq

2

Do you maybe have Docker installed on your system?

3

Yes, I have docker and podman installed.

4

Docker has a bit of a tendency to setup firewall rules which block everything else on the system. I’d recommend looking at iptables -L -n -v to see if perhaps there are Docker generated rules that apply prior to LXD’s and which cause our rules to be ineffective.