[questions] Re: iburst and burst options in NTP

On 02/06/2023 18:17, Mohammed Siddiqi wrote: I am currently working on making sure NTP works according to the RFC 5905 and we use NTP.org implementation of ntpd. I have been going through the RFC and NTP.org’s documentation If you want a definitive implementation of the RFC, you need the

[questions] Re: new ntp server organization

On 11/04/2023 21:28, David Woolley wrote: On 11/04/2023 18:21, Jakob Bohm wrote: I wonder when and why this advice changed from 3 to 4.  When I started I'm pretty sure that Byzantine General protection has been advised for more than 15 years.  It's in the NTPv4 RFC, so it is at least just

[questions] Re: new ntp server organization

On 11/04/2023 18:21, Jakob Bohm wrote: I wonder when and why this advice changed from 3 to 4.  When I started I'm pretty sure that Byzantine General protection has been advised for more than 15 years. It's in the NTPv4 RFC, so it is at least just short of 13 years.

[questions] Re: new ntp server organization

On 07/04/2023 10:47, Renzo Marengo wrote: I know NTP server numbers must be 1, 3 or 4, I don't understand this. NTP servers don't have numbers. They do have a stratum, but that is determined automatically from the current time distribution tree. -- This is questions@lists.ntp.org

[questions] Lebanon DST (was: Iran dst)

On 23/03/2023 14:45, David Woolley wrote: Microsoft also prefer a lead time of at least a year, for such changes It would appear that Lebanon has made a change with less than 3 days notice. They didn't inform IANA, so again they had to rely on private individuals. The IANA change (in 2023b

[questions] Re: Iran dst

On 22/03/2023 17:37, David Woolley wrote: I wonder if this could be the result of an embargo, implemented by either Iran on the USA?  At least for open source software, the latter should not be an issue, as it can be obtained from other countries. Looking at <ht

[questions] Re: Iran dst

On 22/03/2023 15:53, Y J wrote: and mobile phones My Samsung Android has the correct time zone information (as checked in the world clock tab of the clock app). It is possible that the local mobile networks have the wrong information and that telling Android phones to use their actual

[questions] Re: Iran dst

On 22/03/2023 17:37, David Woolley wrote: and so has the IANA master copy of the database This change was committed on the Github version of the database on May 10, 2022 <https://github.com/eggert/tz/commit/66b18d9835dda089d65349c86e7851c4f0746e09> It looks like the change was pub

[questions] Re: Iran dst

On 22/03/2023 16:59, Jim Pennino wrote: DST is NOT controlled by ntp, but rather your operating system's time zone file. Furthermore, Debian Linux has the correct rules: TZ=Asia/Tehran date; TZ=UTC date Wed 22 Mar 20:48:32 +0330 2023 Wed 22 Mar 17:18:32 UTC 2023 and so has the IANA master

[questions] Re: Does anyone know why would server return Key id: 0?

On 01/03/2023 10:10, Mihovil Pupovac wrote: Key id: 0 A crypto NAK: -- This is questions@lists.ntp.org Subscribe: questions+subscr...@lists.ntp.org Unsubscribe: questions+unsubscr...@lists.ntp.org

[questions] Re: Is it possible to connect ntp server via other port?

On 01/01/2023 07:24, Jacob Bingham (UFTS) wrote: I would also like to know the answer to this question, as port forwarding port 1234 to port 123 is problematic for me and I just want to use ntpdate -q localhost (but on port 1234) Looking at the documentation, you can change the source port

[questions] Re: Specify IP for outgoing sync

On 28/09/2022 23:13, Blažej Krajňák wrote: I read the documentation a few times but can not find if it's possible to spcify IP for outgoing connections? NTP uses UDP, which is connectionless. I have server with multiple IP addresses and I need to specify the concrete one to be used to

Re: [questions] GPS+PPS vs NTP server, why a huge offset ?

On 21/06/2022 01:31, chris wrote: Sorry David, but that is incorrect. If you look at the app note you posted, input capture section, quite clearly states that: > When the rising or falling edge is detected at the CCP1 pin, > the interrupt flag CCP1IF bit is set. If you go to a more primary

[questions] Re: NTP community feels broken

On 21/06/2022 10:48, William Unruh wrote: Who cares if it is no longer RS232, if it works. As has been pointed out virtually no rs232 hardware is RS232 according to the standards. Oddly that is the point I was trying to make. Someone was insisting that you mustn't cut corners, and must use

Re: [questions] GPS+PPS vs NTP server, why a huge offset ?

On 20/06/2022 21:32, David Woolley wrote: Actually I think something like that is pretty standard for most microcontrollers. E.g. see <https://www.electronicwings.com/pic/pic18f4550-timer-capture> -- This is questions@lists.ntp.org Subscribe: questions+subscr...@lists.ntp.org Unsub

Re: [questions] GPS+PPS vs NTP server, why a huge offset ?

On 20/06/2022 15:54, chris wrote: Still doesn't explain how the pps state change gets into the system at hardware level. Devil in the detail, as usual. It sounds like a polled system, not an interrupt driven one, Interrupt system are I think pretty much always polled at the hardware level.

[questions] Re: NTP community feels broken

On 20/06/2022 00:14, chris wrote: Early processors often had just a couple of interrupt pins, irq and nmi, You mean microprocessors. NMI seems to be a concept that was introduced with microprocessors, and multi-priority interrupts existed before even the earliest microprocessors. In terms

Re: [questions] GPS+PPS vs NTP server, why a huge offset ?

On 20/06/2022 00:32, chris wrote: Don't really understand what's meant by "input capture timer" ?. Is that related to some polling method, or what ?... I believe they mean a hardware clock, that can be read directly by the software, and is also latched into a register when the PPS signal

Re: [questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 19/06/2022 16:17, Jim Pennino wrote: which is why I would question your "which should be a DB-25". It's RS232's should be. Actually, Wikipedia seems to say that the D version says must be. A lot of this thread is about RS232 compliance, and part of that compliance is using the correct

[questions] Re: NTP community feels broken

On 19/06/2022 16:10, William Unruh wrote: So teminate it to get rid of the refections. It's no longer RS232 if you terminate it anything less than, ISTR, 4k, or reverse terminate in anything other than 300 ohms. I think 100 ohm is typical for the characteristic impedance of a wire pair, so

Re: [questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 19/06/2022 13:46, Jim Pennino wrote: CTS/RTS is pin 8 on a RS-232 connector, so how is that "PPS over USB"? CTS is on pin 5, and RTS on pin 4, on an RS232 connector, which should be a DB-25 one. The DE-9 connector, used on PCs, is a TIA-574 connector, not an RS232 one, and RTS is on pin

[questions] Re: NTP community feels broken

On 19/06/2022 11:30, chris wrote: Yes, it does have a spec for the slew rate, but i'm not sure that would always be met for modern devices, as such uarts can often be run at data rates of up to 230 Kbytes / second, or about a 4uS bit time. That implies much faster rise and fall times, which

[questions] Re: NTP community feels broken

On 19/06/2022 01:06, chris wrote: In practice, that will be small, since the data sheet figures for a typical max232 assume a 2.5nf capacitive load on the output, whereas a few inches of wire into a rs232 line receiver setup might be much faster. As we are talking about compliant RS232, which

Re: [questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 19/06/2022 07:38, Daniel O'Connor wrote: OK, then to which of the USB connector pins do you connect the PPS signal to get "PPS over USB"? You can connect them to CTS or RTS, on FreeBSD these can then hook into the kernel PPS API. It works very well in practise, especially for the cost &

Re: [questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 17/06/2022 20:45, Jim Pennino wrote: Have fun writting the necessary device driver... You can buy chips preloaded with the relevant code for the encode side, for single figure sums and most OSes already include the decode side code. -- This is questions@lists.ntp.org Subscribe:

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 17/06/2022 20:16, Terje Mathisen wrote: The key idea is of course that in order to know where a GPS is located with better than 3 m precision, the unit by implication also knows what time it is, to within 10 ns of UTC(USNO). The only problem is to be able to convey that info to a connected

Re: [questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 17/06/2022 15:01, Jim Pennino wrote: OK, then to which of the USB connector pins do you connect the PPS signal to get "PPS over USB"? D+ and D-, using for example a Communications Device Class module to encode it for transmission. I guess HID would be more appropriate, for an isolated

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 17/06/2022 16:34, chris wrote: As for compatibility, while a mismatched connection may work, it's bad practice to do that, where you are dealing with microsecond timing and want to avoid jitter. Use the correct interfaces and do the job right, then you can fit and forget:-)... RS232 isn't

[questions] Re: NTP community feels broken

On 17/06/2022 19:14, Paul G wrote: Where is it in this tarball:http://www.eecis.udel.edu/~ntp/ntp_spool/ntp4/ntp-4.2/ntp-4.2.8p15.tar.gz If it's not there then you're probably in the wrong list/group. This group is about the NTP protocol, not just the version 4 reference implementation.

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 17/06/2022 00:55, chris wrote: No argument with that, but some have tried to bypass a converter, feeding the ttl pps into the rs232 port, which may work in some cases. TLL pps low level, in particular, won't guarantee the rs232 input line to switch, whereas, of course, the ttl high will

[questions] Re: NTP community feels broken

On 17/06/2022 00:30, chris wrote: lack of full disclosure, documented I'm having trouble understanding what this means. If you mean that the documentation is poor, that is a common problem with open source software, as it relies on volunteer effort, and programmers don't like writing

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 16/06/2022 15:54, Thibaut HUMBERT wrote: I have a serial port, but I don't know how to convert the PPS output (0 / 3.3V) to RS232 (-5V / +5V). RS232 is +/-12V, although, input values of +/-3V are unequivocal. In practice line receivers have both positive and negative going thresholds >

[questions] Re: GPS+PPS vs NTP server, why a huge offset ?

On 16/06/2022 09:01, Thibaut HUMBERT wrote: When I modify the PPS pulse length in u-center, the offset varies: I would suggest you are detecting the wrong edge of the pulse. You may need to add an inverter. -- This is questions@lists.ntp.org Subscribe: questions+subscr...@lists.ntp.org

[questions] Re: Date and time are wrong.

On 10/06/2022 08:47, joshua wrote: connect to the right timezone NTP doesn't use timezones. All servers use times based on UTC. Any timezone issue is a local problem, in your operating system. -- This is questions@lists.ntp.org Subscribe: questions+subscr...@lists.ntp.org Unsubscribe:

[questions] Re: Please Document the Peer Command (and Let the World Know How to Use It)

I think you meant pool, not peer, in the subject...[more interleaved] On 26/05/2022 22:22, Frank Wayne wrote: It is mentioned on the Access Control Commands and Options page (https://www.eecis.udel.edu/~mills/ntp/html/accopt.html#restrict), but there's no reason someone would think to look

Re: [ntp:questions] ntp pool servers disappear - more data

On 26/06/2021 00:12, William Unruh wrote: Not at all sure what you are suggesting. DNS is a way of translating names to IP addresses, which your machine MUST use to talk to a remote As already noted, there is no MUST about it. I'd put it as low as MAY, and it is definitely no more than

Re: [ntp:questions] ntpd on busybox ARM system not keeping time with server

On 19/05/2021 01:57, Jakob Bohm wrote: Perhaps the "tos orphan" option is a better way to make ntpd continue after loss of all time sources. This is a pure client configuration. There is no need for ntpd to continue to serve time after the loss of all sources. The kernel software clock

Re: [ntp:questions] ntpd on busybox ARM system not keeping time with server

On 18/05/2021 12:39, Andreas Schick wrote: I could safely remove the LCL entries and the server line where it lists own IPv4 address of the ARM box I think it is more accurate to say that you CANNOT safely keep these! The self reference is plain wrong.

Re: [ntp:questions] ntpd on busybox ARM system not keeping time with server

On 18/05/2021 12:26, Andreas Schick wrote: server 127.127.1.0 # local clock (LCL) fudge 127.127.1.0 stratum 10 # LCL is unsynchronized Delete these lines. As described, this system is not suitable as a time server, and including these lines on a pure client can actually

Re: [ntp:questions] Incorrect time happens intermittently

On 07/04/2021 02:26, Tze An wrote: [2021-04-06 18:07:25.732] +QNTP: 0,"2021/04/02,10:07:28+32" Also, what software are you using to process timezones, as "+32" is not a real world time zone offset. It is conceivable that your problem is in the software you use to convert UTC to your local

Re: [ntp:questions] Incorrect time happens intermittently

On 07/04/2021 02:26, Tze An wrote: I've got incorrect time from NTP server, always 4 days before the actual datetime. You can see from the logs below, I got 2nd April on 6th April. Incorrect time from NTP server [2021-04-06 18:07:24.841] Clock:Info: Synchronizing time with NTP server...

Re: [ntp:questions] Ntpq.exe memory issue with windows 2019

On 28/10/2020 18:01, Uwe Klein wrote: That does not jibe with "creeping increase of memory taken". If Win keeps something for reuse ... it should not grow but be reused later again kept for ...:-) As I said, I'm not familiar with the way that Windows shows memory statistics, but I do know

Re: [ntp:questions] Ntpq.exe memory issue with windows 2019

On 21/10/2020 15:44, Sadique Urf Arbaz Sayyed wrote: The process will hold the 24Kb but actually the process is not visible in Task manager or anywhere but in RamMap we see that the executed process still occupied the Page table memory. Did you mean 24KB, or is that really 3KB? Any memory

Re: [ntp:questions] Local Time NTP Server

On 15/09/2020 23:20, William Unruh wrote: the noun is Coordinate The noun is Time. The C* is an adjective, coordinated or coordonné. It appears the abbreviation is not in correct word order for either of French or English:

Re: [ntp:questions] Local Time NTP Server

On 24/08/2020 18:48, William Unruh wrote: You need it to be fixed, eg to the stars. The stars move, and, in any case, most people want solar time, not sidereal time. Even solar time varies throughout the year. I think the "mean" in GMT refers to the fact that midnight is only true on

Re: [ntp:questions] create charts

On 21/08/2020 11:39, thimoo...@gmail.com wrote: I have a question. how do you make a graph of your ntp server and is that possible What parameter do you want to represent? Remember that the actual error from true time is never known, because, if it could be known, it could be made to be

Re: [ntp:questions] Performance estimation

On 16/06/2020 17:11, William Unruh wrote: The question then is how rapidly the system can respond to an interrupt,. This at least used to be of the order of a microsecond. Also, how logd does it take to read the clock with the kernel gettime routines. They all limit the accuracy of your clock

Re: [ntp:questions] Performance estimation

On 15/06/2020 15:38, David Taylor wrote: https://www.eecis.udel.edu/~mills/ntp/html/cluster.html What is the clock resolution? If you try and measure jitters that aren't several times the resolution, they are not going to be particularly valid. If the hardware clock is almost dead on,

Re: [ntp:questions] time accuracy and stratum

On 06/04/2020 11:00, David Woolley wrote: On 25/03/2020 17:43, Jérôme Perrin wrote: I need to understand the time accuracy for a client of a given stratum (5). The information for accuracy is retrieved from ntpstat command. The accuracy only indirectly depends on stratum. The time is likely

Re: [ntp:questions] time accuracy and stratum

On 25/03/2020 17:43, Jérôme Perrin wrote: I need to understand the time accuracy for a client of a given stratum (5). The information for accuracy is retrieved from ntpstat command. The accuracy only indirectly depends on stratum. The time is likely to be within +/- root dispersion of the

Re: [ntp:questions] Trying to reply to an NTP Questions request I get this

On 21/08/2019 17:42, David Taylor wrote: You are not allowed to post to this mailing list From: a domain which publishes a DMARC policy of reject or quarantine, blueyonder doesn't appear to publish any DMARC policy. Did you actually use a blueyonder address as the header From:? It is also

Re: [ntp:questions] [META] Trying to reply to an NTP Questions request I get this

On 21/08/2019 17:42, David Taylor wrote: Trying to reply to an NTP Questions request I get this: You are not allowed to post to this mailing list From: a domain which publishes a DMARC policy of reject or quarantine, and your message has been

Re: [ntp:questions] Reference 'sntp' utility: how do you set the destination port number

On 21/07/2019 00:26, stua...@longlandclan.id.au wrote: This implies that someone was naïve enough to assume the destination port number was never going to change. The reference version is almost certainly just that, a reference version. It is there to illustrate how the protocol works, and

Re: [ntp:questions] Garmin LVC 18x jitter problem

On 12/07/2019 11:32, William Unruh wrote: Do not use nmea as a time source. It it has a long delay ( hundreds of ms) which depnds on the speed of connection, on length of the nmea sentance, etc. EAch character takes from 100 of usec to ms to be delivered, and the lengthof sentences is variable,

Re: [ntp:questions] Time server question

On 21/06/2019 12:26, Thomas Laus wrote: Will either isolation solution have direct access to the computer CPU? The GPS clock will need the ability to directly adjust the frequency of the CPU to achieve expected results for a Stratum 1 serve I'm not aware of anything in ntpd that directly

[ntp:questions] [META] Please Report Dissolved Boxes Spam to Google.

Recently I've been religiously reporting the Case Solutions spam that is appearing on the newsgroup side of this combined list and newsgroup, with no effect. The spam is being injected via Google, but their groups-abuse email address appears to be broken, so there is only the web interface

Re: [ntp:questions] Hoes a IoT device discover the NTP era with NTPv4?

On 11/03/2019 19:59, Nelson Bolyard wrote: But 2036 is fast approaching. I want to know how, using NTPv4, a device like mine can figure out that it is no longer in era zero. Once it figures out the era that it is in, the rest should be easy. Assume that no date is before the design date

Re: [ntp:questions] What is the mean of below output?

On 06/08/18 08:16, ashishchugh@gmail.com wrote: 3- Is there is any way through i can determine that what is the currently difference between my local system and ntp server. No. If you could, NTP could modify the local time to make the value zero.

Re: [ntp:questions] How can i make sure that how much time ntp is adjusting one day

On 05/08/18 07:15, aashish.ch...@fonantrix.com wrote: i enable the ntp, how can end of the day i can get the total time which ntp adjusted. NTP adjusts frequency, not time. It doesn't predict what the internal clock would show if it hadn't been adjusted when i execute ntpstat command i

Re: [ntp:questions] Difference between offset (ntpq -p) and offset (ntpq -crv)

On 01/08/18 19:32, David Taylor wrote: Would I be right in thinking of the "*" line as simply being the offset from that particular server, and the "system" variable as being the offset from some virtual internal clock which ntp has as its best estimate of the correct time (e.g. UTC). That

Re: [ntp:questions] This is project have any SLA and does it meets th PCI and DSS compliance

On 12/05/18 18:55, bhuvaneshwara...@powerupcloud.com wrote: We are going to use these pool servers for our production env, so we need to know that you have any SLA for uptime and does this project meets the PCI and DSS compliance? There is no service level agreement. If you want a service

Re: [ntp:questions] Who Owns or Administers this Group?

On 05/02/18 20:09, Steve Sullivan wrote: [No question. Assuming the subject should have been in the body.] Steve Sullivan | Client Support & Development Network Time Foundation This "group" is actually two "groups" gatewayed together. I am reading this on the USENET side of the gateway,

Re: [ntp:questions] false ticker after GPS coldreset

On 01/11/17 11:46, valizadeh...@gmail.com wrote: local lcok is there because my system is not connected to internet and i need to have the hwclock to keep the time during power-offs,i have disabled the pre installed fakeclock and used an I2c connected battery backed up RTC chip. Local clock

Re: [ntp:questions] What I've learned about sun clocks and ntp

On 03/08/17 10:56, rahl...@gmail.com wrote: If I understoodhttps://tools.ietf.org/html/rfc5905 correctly, NTP stratum-1 servers have to provide UTC time and cannot use an alternative timezone. If you can live with mean solar time, rather than sundial time, all modern Unix-like systems can do

Re: [ntp:questions] What I've learned about sun clocks and ntp

On 03/08/17 13:02, William Unruh wrote: UTC is mean solar time at Grenwich in London UTC was never this. GMT used to be, but I think is now UT1. UTC has only ever ticked at the TAI rate, with leap seconds. s/Gre// ___ questions mailing list

Re: [ntp:questions] NTPQ -P shows both IP and DNS name (parsing problem)

On 20/06/17 14:55, roman.mescherya...@gmail.com wrote: -193.11.114.43 (tor1.mdfnet.se) See the line starting with “-193.11.114.43 (tor1.mdfnet.se)” This strange peer breaks extracting fields by index. For the above example it extracts “(“ as “refid” value instead of “75.17.28.47” and “29.118”

Re: [ntp:questions] NTP under AIX?

On 16/05/17 16:37, Greg Moeller wrote: Has anyone come across the advisability of running an enterprise-wide NTP server under an AIX LPAR? We're currently running NTP on old Intel hardware and the company policy is to refresh hardware on a regular basis. It seems a waste to buy several new

Re: [ntp:questions] what is refid in ntpq -pn

On 06/05/17 22:24, Hans Mayer wrote: I always thought "refid" for command "ntpq -pn" shows the next upstream server for the remote server listed below "remote". But now I have my concerns. Officially, it is an opaque 32 bit identifier for the selected upstream peer of the peer. You are

Re: [ntp:questions] NTP server - Number of received petitions.

On 08/03/17 10:53, Micron wrote: Recently, I've added my NTP server in the pool and I'm looking for the way to know the number of petitions received from clients. Please could you indicate where petition is defined in the context of NTP. I have never seen it used before.

Re: [ntp:questions] How common is LI=3 - solved.

On 05/02/17 00:22, Robert Scott wrote: I hope to achieve a frequency accuracy of 5 PPM. Once that measurement is made, I store it for subsequent use in my app. The equipment doesn't have a very long service life and is in a temperature controlled environment, as I think both ageing and

Re: [ntp:questions] How common is LI=3 - solved.

On 03/02/17 23:10, Robert Scott wrote: But with other servers, the first response came back good, the second response came back LI=3, the third and fourth responses never came back at all. (recvfrom() has to be aborted). Is this possibly a defense mechanism against a DOS attack? See

Re: [ntp:questions] Writing the drift file

On 08/03/15 11:01, Mike Cook wrote: Current practice appears to be to open and write each new value to a temporary file then unlink the old and rename the temporary file. This means that a whole new file structure including new blocks is created each time and the old one freed up. So even in

Re: [ntp:questions] chrony as a server

On 23/02/15 21:23, William Unruh wrote: manual corrections are probably good to 1 sec. to get 1 sec at 2ppm is about 5 days per measurement or 10 days altogether. It's a long time since I did this, but 200ms is more like it (might have been 100ms). You need digital clock that is, itself,

Re: [ntp:questions] Pool server gone wild

On 20/02/15 08:45, Roger wrote: http://www.pool.ntp.org/scores/90.155.73.34 How does one alert an operator that their server is sick? Checking back through my peerstats I see that last entry which was okay was 2015-02-16 15:08:56. You could run whois on the address and contact the

Re: [ntp:questions] chrony as a server

On 15/02/15 22:40, Rob wrote: it is tracking very nicely Tracking what? ___ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions

Re: [ntp:questions] NTP offset doesn't change.

On 10/02/15 05:15, catherine.wei1...@gmail.com wrote: Hi, I'm using the ntpd to sync time. When I change the current date for exampe to 0210020215 (2015-02-10 02:02), the actually current time is 2015-02-10 03:02, then I run ntpq -p for several times, the offset doesn't change at all.

Re: [ntp:questions] Shared PPS source/Multiple PPS sources

On 07/02/15 08:24, Rob wrote: And a side question: Is it the GPS module that calculates when the PPS goes active? Is this signal compensated for the time it takes the signal from the sats in the module, or on the SV? Yes, the module calculates the position and time fix from the signals of at

Re: [ntp:questions] Mitigating the ::1 spoof vulnerability

On 06/02/15 12:17, Marco Marongiu wrote: I'm referring to this one in particular: ::1 can be spoofed on some OSes, so ACLs based on IPv6 ::1 addresses can be bypassed. Debian Squeeze doesn't have a patched package available in the squeeze-lts series yet. On those clients would a restriction

Re: [ntp:questions] Leap second to be introduced in June

On 26/01/15 17:11, William Unruh wrote: physical principle ( the frequency of oscillation of a cesium atom in a XX certain transition) and the rotation of the earth. It used to be defined ^not It's a quantum

Re: [ntp:questions] Timekeeping on Windows 2008r2 VM on Linux QEMU/KVM

On 22/01/15 00:02, William Unruh wrote: I believe ntpdate simply sets the clock. No slewing. It could not, since slewing must assume that the program is running for a while so it can switch off the slewing. ntpdate just runs once. The adjtime takes an offset and then slews at +/- 500 ppm until

Re: [ntp:questions] Leap second to be introduced in June

On 21/01/15 10:39, Mike Cook wrote: I couldn’t find a definition of a monotonous function. It's an obvious mis-choice of words by someone whose name suggests they aren't native English speaker. It clearly is intended to mean monotonic. See

Re: [ntp:questions] Leap second to be introduced in June

On 19/01/15 12:15, Mike S wrote: You clearly misunderstood TF.460, because you still have it wrong. There is no discontinuity, the two scales merely count time differently. This is how the time of the next leap second will be enumerated in each: You are relying on an appendix that deals with

Re: [ntp:questions] I don't understand Restrict statements!

On 19/01/15 09:55, David Taylor wrote: restrict source notrap nomodify nopeer Xquery restrict 192.168.0.0 mask 255.255.255.0 Xpeer If X is not no the permission is enabled, and you do not need to specify it. restrict lists restriction. Everything unrestricted is allowed. Only one restrict

Re: [ntp:questions] Leap second to be introduced in June

On 15/01/15 07:56, Terje Mathisen wrote: Did we have a leap second last June? Or did you intend to check for 2015? Oops. I did get it right in the dry run, but not in the run I actually used: david@dhcppc4:~$ TZ=/usr/share/zoneinfo/right/UTC date -d '30 June 2015 86400 seconds' Wed Jul

Re: [ntp:questions] Leap second to be introduced in June

On 14/01/15 16:37, Terje Mathisen wrote: The calls I'm thinking of are those you make to convert an OS-supplied time_t (file) system timestamp to YMDHMS etc. Those calls have no need to be in the kernel, and they are not in Unix/Linux systems. I.e. even Windows (which uses a seconds-based

Re: [ntp:questions] Leap second to be introduced in June

On 12/01/15 16:10, Marco Marongiu wrote: If so, does it also mean that it would do the same when you disable the kernel discipline by adding a disable kernel in ntp.conf? (Or by trying to disable stepping. A lot of people seem to run systems that are incompatible with the use of the kernel

Re: [ntp:questions] UK pool server denying access

On 30/12/14 08:21, Mike Cook wrote: This guy needs bouncing The abuse address for the payload web site's hosting company is: mailto:ab...@eukhost.com That for the company that hosts the submission account is: mailto:groups-ab...@google.com ___

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 22/12/14 04:02, Paul wrote: And yet people apply critical monthly patches from Microsoft and Oracle all the time without running them through dev and q/a. Not on business critical servers. They may well apply them to general purpose desk top machines, but even then, if they don't have

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 20/12/14 22:01, Rob wrote: David Woolley david@ex.djwhome.demon.invalid wrote: On 20/12/14 19:58, William Unruh wrote: Is it an ntp packet (ie a time exchange packet)? is it a control packet (eg ntpq type packet?) or what? Ie, unless you use crypto, these two look like they might

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 20/12/14 20:54, A C wrote: Ok, so the remaining uncertainty is whether some of the crafted packets can be the response packets for a normal time exchange or if they're only query/config packets. The advisory isn't completely clear on what types of packets can cause the buffer overflows.

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 21/12/14 10:48, Rob wrote: People say disable crypto but there is no clear direction in the docs on how to do that. There is no crypto off or disable crypto config directive at first glance. So how is this done? I would assume by not enabling it.

Re: [ntp:questions] Restrict statements and the pool directive

On 21/12/14 11:24, Rob wrote: Anyway, I consider it a bug. I don't want to lift restrictions to arbitrary systems selected from a pool. So, out went the pool command. Why do you want to specify pool servers if you want to restrict their use so that you cannot use them? When people say

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 21/12/14 11:38, Rob wrote: David Woolley david@ex.djwhome.demon.invalid wrote: On 21/12/14 10:48, Rob wrote: People say disable crypto but there is no clear direction in the docs on how to do that. There is no crypto off or disable crypto config directive at first glance. So how

Re: [ntp:questions] Restrict statements and the pool directive

On 21/12/14 20:10, Rob wrote: What I got from the documentation is that without nopeer a server could setup a peer association. I don't like that. No. Without nopeer, a *client* can't set up a peer session. If you are using a system as a server, it cannot cause you more disruption than if

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 20/12/14 09:22, Martin Burnicki wrote: As far as I understand the reports on bugzilla the main vulnerabilities are in functions where signed packets (symmetric key or autokey) are received/checked, or dynamic/remote configuration via ntpq and/or ntpdc is enabled, which, as far as I know

Re: [ntp:questions] What to do for clients less than 4.2.8?

On 20/12/14 19:58, William Unruh wrote: Is it an ntp packet (ie a time exchange packet)? is it a control packet (eg ntpq type packet?) or what? Ie, unless you use crypto, these two look like they might be dangerous. Both routines only process NTP type 6 packets, i.e. nptq.

Re: [ntp:questions] ATOM driver not working on Linux

On 14/12/14 09:33, David Taylor wrote: On checking the config.log I see that timepps.h is missing: Please read before posting. This has been extensively discussed over the last week. ___ questions mailing list questions@lists.ntp.org

Re: [ntp:questions] NTP PPS, part 2 ;)

On 12/12/14 12:40, Martin Burnicki wrote: Harlan Stenn wrote: Martin Burnicki writes: IMO the best approach would be to detect this at runtime. That means we'd need a header file... It shouldn't be a problem to add this to the NTP code base. NTP doesn't control this interface. The de

Re: [ntp:questions] NTP PPS, part 2 ;)

On 12/12/14 16:28, Paul wrote: On Fri, Dec 12, 2014 at 9:47 AM, David Woolley david@ex.djwhome.demon.invalid wrote: NTP doesn't control this interface. The de facto interface is defined by the kernel code. I don't understand this. My misunderstanding. I thought this was doing the job

Re: [ntp:questions] Red Hat vote for chrony

On 09/12/14 07:06, Charles Swiger wrote: Yes, I also find it a bit surprising than modern desktop CPUs and GPUs are willing to run right up to their thermal trip points of ~80 C or so rather than bump up fan speed a little more to keep them more around 50 C. Cost engineering, for what is a

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