@Serge: I was just going by what I read in comment #1 where vnet0 was named.
You are right. Adding --bind-interfaces and --exclude-interface=virbr0 allows both the general dnsmasq and the libvirt-bin dnsmasq to start. Without --bind-interfaces and --exclude-interface=virbr0: dnsmasq[5279]: failed to create listening socket for 192.168.122.1: Address already in use dnsmasq[5279]: FAILED to start up With --bind-interfaces and --exclude-interface=virbr0: dnsmasq[5737]: started, version 2.59 cachesize 150 dnsmasq[5737]: compile time options: IPv6 GNU-getopt DBus i18n DHCP TFTP conntrack IDN dnsmasq-dhcp[5737]: DHCP, IP range 192.168.122.2 -- 192.168.122.254, lease time 1h dnsmasq[5737]: reading /etc/resolv.conf dnsmasq[5737]: using nameserver 127.0.0.1#53 dnsmasq[5737]: read /etc/hosts - 7 addresses $ ps -elf|grep dnsmasq 5 S dnsmasq 5441 1 0 80 0 - 8253 poll_s 14:02 ? 00:00:00 /usr/sbin/dnsmasq -x /var/run/dnsmasq/dnsmasq.pid -u dnsmasq -r /var/run/dnsmasq/resolv.conf -7 /etc/dnsmasq.d,.dpkg-dist,.dpkg-old,.dpkg-new --bind-interfaces --except-interface=virbr0 5 S 117 5737 1 0 80 0 - 6491 poll_s 14:03 ? 00:00:00 /usr/sbin/dnsmasq -u libvirt-dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file= --except-interface lo --listen-address 192.168.122.1 --dhcp-range 192.168.122.2,192.168.122.254 --dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases --dhcp-lease-max=253 --dhcp-no-override -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to dnsmasq in Ubuntu. https://bugs.launchpad.net/bugs/231060 Title: packages dnsmasq and libvirt-bin conflict with each other To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/231060/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs