On Tue, Sep 10, 2013 at 05:59:52PM -0400, Olafur Gudmundsson wrote: > My colleagues and I worked on OpenWrt routers to get Unbound to work > there, what you need to do is to start DNS up in non-validating mode wait > for NTP to fix time, then check if the link allows DNSSEC answers > through, at which point you can enable DNSSEC validation.
That's roughly what we did with BIND on OpenWrt/CeroWrt as well. We also discussed hacking NTP to set the CD bit on its initial DNS queries, but I don't think any of the code made it upstream. My real recommendation would be to run an NTP pool in an anycast cloud of well-known v4 and v6 addresses guaranteed to be reliable over a period of years. NTP could then fall back to those addresses if unable to look up the server it was configured to use. DNS relies on a well-known set of root server addresses for bootstrapping; I don't see why NTP shouldn't do the same. (Actually... the root nameservers could *almost* provide a workable time tick for bootstrapping purposes right now: the SOA record for the root zone encodes today's date in the serial number. So you do the SOA lookup, set your system clock, attempt validation; on failure, set the clock an hour forward and try again; on success, use NTP to fine-tune. Klugey! :) ) -- Evan Hunt -- e...@isc.org Internet Systems Consortium, Inc. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
