function prequery ( dnspacket )
  qname, qtype = dnspacket:getQuestion()
  remote = tostring(dnspacket:getRemote())
  if qname == newDN("stest.com.") and remote ~= "127.0.0.2" then
    dnspacket:setRcode(pdns.NXDOMAIN)
    return true
    end
  return false
end