On 5/21/24 18:02, Arun Mani J wrote: > > Sorry I thought I clicked Reply instead of Reply All. > > So I restarted my laptop, ran virsh net-destroy > default && virsh net-start default. Then created a new VM out of Debian 12 KDE Live ISO (to avoid any trailing configurations). > > Still the issue persists. nmcli in the guest says enp1s0: disconnected. This looks weird. I'm not familiar with networkmanager, but I suspect this is not telling the state of the link, is it? Because the link should be up no matter the host side configuration. > > But ps axf | grep dnsmasq gives this: > 4341 pts/0 S+ 0:00 | \_ grep --color=auto dnsmasq > 3995 ? S 0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper > 3996 ? S 0:00 \_ /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/lib/libvirt/libvirt_leaseshelper > > What am I missing :( One thing that comes to my mind is - ip forwarding. Libvirt sets up NAT and should set enable ip forwarding too, but maybe that failed? Inside the host - can you share the output of: cat /proc/sys/net/ipv4/ip_forward brctl show virbr0 for i in nat filter mangle; do iptables -t $i -L -v ; done Michal
