Hi Tim, On Wed, 2024-07-10 at 21:55 +0200, Tim Tassonis wrote: > Hi all > > I tried using dnsmasq as local resolver, which in general works fine. > > However, I however would like to run a second instance of dnsmasq > binding only to a tap0, for a virtual network (vde2) for some qemu > virtual machines, and I can't seem to get that to work, as it always > complains about 127.0.0.1 already being taken. > > I tried: > > > DHCP_OPT="192.168.8.9,192.1688.8.99,255.255.255.0,192.168.8.255,8h" > dnsmasq --log-queries --user=dnsmasq \ > --dhcp-leasefile=/var/lib/misc/qemu-vde-dnsmasq.leases \ > --dhcp-range=$DHCP_RANGE \ > --listen-address=192.168.8.1 \ > --interface=tap0 --except-interface=lo \ > --domain=decentral.ch \ > --enable-tftp \ > --dhcp-boot=/var/lib/qemu-vde/pxeboot/pxelinux.0 \ > --pid-file=/run/qemu-vde-dnsmasq.pid > > > > This works fine, but only if the local dnsmasq is not started. > > Otherwise, it will fail with: > > dnsmasq: failed to create listening socket for 127.0.0.1: Address > already in use > > Any ideas?
Looks like --bind-interfaces is missing from your configuration. I would also recommend to drop --interface and --except-interface, and only keep --listen-address. Please re-read the manual page: -i, --interface=<interface name> Listen only on the specified interface(s). Dnsmasq automatically adds the loopback (local) interface to the list of interfaces to use when the --interface option is used. [...] -a, --listen-address=<ipaddr> Listen on the given IP address(es). Both --interface and --listen- address options may be given, in which case the set of both interfaces and addresses is used. Note that if no --interface option is given, but --listen-address is, dnsmasq will not automatically listen on the loopback interface. To achieve this, its IP address, 127.0.0.1, must be explicitly given as a --listen-address option. -z, --bind-interfaces On systems which support it, dnsmasq binds the wildcard address, even when it is listening on only some interfaces. [...] Setting this option also enables multiple instances of dnsmasq which provide DHCP service to run in the same machine. Hope this helps, Cheers, Sven -- GPG Fingerprint 3DF5 E8AA 43FC 9FDF D086 F195 ADF5 0EDA F8AD D585
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