Dnsmasq instance created by lxd instance listenin all ips

LXD
1

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is there any way to bind an ip to that all zeros ?
I was changed lxdbr0 network configs, i added listen-address to raw.dnsmasq field but it does not change it just changing the port 53 dsnmasq processes.
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This is the network config :
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2

Hi,

Dnsmasq is configured to listen on the bridge interface, but not all IPs on all interfaces.

What is the use case for listening on a specific IP?

Thanks

3

Just a guess, but I’d wager that the OP wants to run either a DHCP or DNS server in an LXC container.

If my $0.02 wager is indeed correct, I’d say they make use of:

  1. dhcrelay for DHCP on the host and punt requests to the LXD bridge ip, and
  2. DNAT or REDIRECT firewall rules to redirect DNS requests

Just thinking out loud really…

4

Hello, thanks for response.
It was a security issue for a project. I changed dnsmasq.raw files and try many things but i could not bind an ip to port 67. Also i looked source code of the lxd and dnsmasq then i find this socket option. So it was enough for me.
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But out of curiosity is it possible to bind an ip to that?