[Dnsmasq-discuss] Struggling with multiple nameservers

[Harry Moyes]

I have a Raspberry Pi configured with two dummy interfaces in addition 
to the default Ethernet interface.

I have a workable configuration on the pi with unbound and NSD on the 
two virtual interfaces, and dnsmasq on the Ethernet and loopback interfaces.

Workable that is with this package loaded. (present default raspbian 
default install)

dnsmasq/stable,now2.76-5+rpt1+deb9u1 all[installed] dnsmasq- 
base/stable,now2.76-5+rpt1+deb9u1 armhf [installed,automatic]

and this config fragment:


bind-interfaces
listen-address=172.25.25.146listen-address=127.0.0.1server=192.168.55.9
no-dhcp-interface=eth0
no-dhcp-interface=dummy0
no-dhcp-interface=dummy1

This setup is fully functional and does all I ask.

**However**

I'm actually trying to run pihole-FTL on the Pi, rather than dnsmasq 
directly, which I'm told, includes a locally derived version of dnsmasq 2.8.

That derivative version appears to ignore the bind-interfaces directive, 
and thus fails to bind the name server ports, even though the specified 
interfaces are free.

The developers of that derivative are convinced that functionally their 
derivative imports 2.8 in its entirety,simply adds additional monitoring 
hooks.

I'm obviously not expecting assistance with the pihole-FTP but I'd 
really appreciate any hints of changes intentional or otherwise, that 
may affect the behaviour of "mainline" dnsmasq with respect its 
behaviour binding the wildcard interface, that may have taken place 
between 2.76 and 2.8 to try to understand where the change in behaviour 
comes from.

I'm pretty much convinced I need to build and test a mainline version of 
dnsmasq 2.8 from source, to localise where the issue is coming from,
but I thought I'd respectfully ask here in case someone here can point 
me in the right direction.

Harry