macfilter-2.lua

-- load this and the previous snippet as 'lua-dns-script=macfilter.lua' 
function macPrint(a)
        return string.format("%02x:%02x:%02x:%02x:%02x:%02x", a:byte(1), a:byte(2), a:byte(3), a:byte(4), a:byte(5), a:byte(6))
end

function preresolve(dq)
        print("Got question for "..dq.qname:toString().." from "..dq.remoteaddr:toString().." to "..dq.localaddr:toString())

        local a=dq:getEDNSOption(65001)
        if(a ~= nil) then
                print("There is an EDNS option 65001 present: "..macPrint(a))
                if(filter[dq.remoteaddr:toString()][macPrint(a)] and baddomains:check(dq.qname)) then
                        print("Wanted filtering")
                        dq:addAnswer(pdns.CNAME, "blockingserver.powerdns.com")
                        return true
                end
                -- an obvious enhancement is to implement a 'default' mac address describing the default 
                -- filtering an IP address wants
        end
        return false
end

Hi,

I'm a PowerDNS newbie, and after many time of work on your script I realize that there is missing code after

dq:addAnswer(pdns.CNAME, "blockingserver.powerdns.com")

Maybe 2 lines of code must be inserted

dq.rcode = 0
dq.followupFunction="followCNAMERecords"

Please, tell me if this is correct or no.

Regards
Pasquale