Re: [homenet] NTP in Homenet?
How do Homenet routers configure NTP? Just use the pool? Either use the pool or use one from an SNTP DHCP option an edge router received from an ISP and published in HNCP. ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
How do Homenet routers configure NTP? Just use the pool? Either use the pool or use one from an SNTP DHCP option an edge router received from an ISP and published in HNCP. +1 Default (e.g., in open source implementations) should be to use the pool, in the absence of DHCP option info. Router manufacturers / ISPs may choose to default their routers to other NTP servers. RFC 7084 recommends support for NTP option. If NTP is supported, the router is required to request the DHCPv6 option and use that, if it gets a response. Barbara ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
[homenet] NTP in Homenet?
How do Homenet routers configure NTP? Just use the pool? ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
Hi, would be nice to have a NTP daemon on every Homenet router... gateways pull their time from the uplink, every other router pulls time from the gateway routers. Henning Rogge On Tue, Aug 18, 2015 at 2:34 PM, Juliusz Chroboczek j...@pps.univ-paris-diderot.fr wrote: How do Homenet routers configure NTP? Just use the pool? ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
On Tuesday, August 18, 2015, Henning Rogge hro...@gmail.com wrote: Hi, would be nice to have a NTP daemon on every Homenet router... gateways pull their time from the uplink, every other router pulls time from the gateway routers. Henning Rogge On Tue, Aug 18, 2015 at 2:34 PM, Juliusz Chroboczek j...@pps.univ-paris-diderot.fr javascript:_e(%7B%7D,'cvml','j...@pps.univ-paris-diderot.fr'); wrote: How do Homenet routers configure NTP? Just use the pool? ___ homenet mailing list homenet@ietf.org javascript:_e(%7B%7D,'cvml','homenet@ietf.org'); https://www.ietf.org/mailman/listinfo/homenet I'd rather not have yet another service to exploit running on the gateway. Gateways have historically horrible security records and ntp exploits have nearly crushed the internet in the last few years. CB ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
Either use the pool or use one from an SNTP DHCP option an edge router received from an ISP and published in HNCP. Ah, silly me. Yes, of course, we're already publishing DHCP(v6) options. RFC 7084 recommends support for NTP option. If NTP is supported, the router is required to request the DHCPv6 option and use that, if it gets a response. Ok. That means that we don't want any NTP peering within the Homenet, right? -- Juliusz ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
I don't know of anything in the homenet routers that require a peering level of synchronization. And I think it would be dangerous to suggest it's achievable. Well, if configured with both client-server and peer relationships, NTP will converge to a set of disjoint lowest-dispersion trees, so I guess there's no harm in automatically configuring some peer relationships. But I agree with you that it doesn't need to be mentioned in the spec. It's clear to me now, thanks to both of you, I'll try to hack something up. (The reason I'm asking is that once shncpd has learned to do local configuration of DNS and NTP, it can be used instead of a DHCP/RA client -- with fast roaming as an added benefit. Does my enthusiasm show, or do I need to spam even more?) -- Juliusz ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
Either use the pool or use one from an SNTP DHCP option an edge router received from an ISP and published in HNCP. Ah, silly me. Yes, of course, we're already publishing DHCP(v6) options. RFC 7084 recommends support for NTP option. If NTP is supported, the router is required to request the DHCPv6 option and use that, if it gets a response. Ok. That means that we don't want any NTP peering within the Homenet, right? I don't know of anything in the homenet routers that require a peering level of synchronization. And I think it would be dangerous to suggest it's achievable. I can easily envision a multihomed network, where each CE router gets time from its ISP, and doesn't care what other devices in the home network do (or optionally both try to propagate their time). And then there are all the hosts doing their own thing. The most common use for NTP time that I know of is in logs. To get a reasonable sense of when something happened. So I'd suggest to keep it simple and not try for or expect synchronization. Barbara ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
Re: [homenet] NTP in Homenet?
On Tue, Aug 18, 2015 at 3:21 PM, Juliusz Chroboczek j...@pps.univ-paris-diderot.fr wrote: Either use the pool or use one from an SNTP DHCP option an edge router received from an ISP and published in HNCP. Ah, silly me. Yes, of course, we're already publishing DHCP(v6) options. RFC 7084 recommends support for NTP option. If NTP is supported, the router is required to request the DHCPv6 option and use that, if it gets a response. Ok. That means that we don't want any NTP peering within the Homenet, right? There has been some good work starting up around ntp of late. I personally would rather like it if accurate time could be provided if an accurate device (gps) was found, and ntp was secured, and sane, and local when possible. there are two good mailing lists for getting opinions about where ntp should go and/or is going are - time-nuts and gpsd-devel and this was very good news on this front: http://www.informationweek.com/cloud/infrastructure-as-a-service/linux-foundation-funds-ntps-father-time/d/d-id/1321775 -- Juliusz ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet -- Dave Täht worldwide bufferbloat report: http://www.dslreports.com/speedtest/results/bufferbloat And: What will it take to vastly improve wifi for everyone? https://plus.google.com/u/0/explore/makewififast ___ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
