dnsmasq - no address range available for DHCPv6 request via wan warnings

Started by CaskAle, February 09, 2026, 11:28:01 PM

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I recently migrated my opnsense to the newed default of using dnsmasq along with unbound.  I am using both ipv4 and ipv6 across 4 vlans.  All is mostly working fine however, my dnsmasq log is innundated with the followoing warning. "no address range available for DHCPv6 request via igb3"  In my case, igb3 is my WAN interface.I am getting them at least one per minute.  My WAN interface is getting its ipv6 address from the isp directly via DHCP and I am thinking I should not need to include an address range in dnsmasq for this inteface?  I tried disabling the wan interface in the dnsmasq general settings but then nothing worked.  Is there a way to get this warning addressed properly.  I realize it is just a waring but I like to try and have everything working as designed.  Also, its rather hard to look for real errors in the log when it is full of these warnings.

Any help is greatly appreciated, thanks
troy

In the DNSmasq Interface setting, after you disabled the WAN interface, were the other interfaces that you do need DNSmasq on checked? I just finished the swithover from ISC to DNSmasq myself today, and didn't see any such warnings in my DNSmasq logs. I know the little help blurb for Interface says "If no interfaces are selected, Dnsmasq will listen on all available IPv4 and IPv6 addresses by default", but I find more often then not, that you have to add in or explicitly choose an option to make sure it actually works.