DHCP and DNS Cache

I already setup dnsmasq for IPv4 and so there is very little that needs to be done to add IPv6 support.

I just needed to add dhcp-range lines for each subnet. I am tagging them the same as ~~before.~~before ~~I'm~~and ~~also~~using ~~telling~~the ::,constructor:<interface> syntax to tell dnsmasq to ~~look~~determine ~~at each interface to get~~the the prefix ~~delegatd~~the ~~for~~DHCPv6 ~~this~~range ~~subnet~~should ~~and~~be ~~tell~~valid ~~clients~~over from the GUAs (Global Unicast Addresse) (publically routable IPs) on each interface. These were assigned in the previous section (Prefix Delegation) by wide-dhcpv6-client. Declaring ra-stateless configures dnsmasq to use SLAAC to automatically configure ~~their~~clients ~~addresses.~~in this prefix.

# /etc/dnsmasq.d/dhcp.conf
+ dhcp-range=set:lan,::,constructor:eth1,ra-stateless,12h
+ dhcp-range=set:dmz,::,constructor:eth1.8,ra-stateless,12h
+ dhcp-range=set:warp,::,constructor:eth1.9,ra-stateless,5m

Then just enable router advertisements so dnsmasq will broadcast information to any potential clients on the subnet.

# /etc/dnsmasq.d/router-advertisements.conf
+ enable-ra