Long time lurker, first time poster. In the past, I've purchased the LeoNTP server to act as a local time server on my work network. Unfortunately, those NTP servers aren't available to order. I'm in need of two - three more NTP servers for various locations. Do any of you have an alternate NTP server recommendation? 1. I'd like to keep the price less than $1,000. The Leo's were a great, self contained choice at less than $400. 2. Support for IPv4 is required and IPv6 is desired. The main shortcoming I have with the Leo's is no support for IPv6. 3. I'll serve about 150 clients per site from a given NTP server. My NTP clients are a combination of Windows and Linux computers along with various types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's don't even breathe hard at that level. 4. No PTP support is required. My timing needs are IT related - log consistency, security protocol requirements, etc. 4. I'm not interested in building and using something like a Raspberry Pi. I'll be sending these to remote sites and don't want to worry about issues like memory card failures and the hobbyist feel of many Pi cases and cooling options. That's fine for my home but not for work. 5. Availability is important. Any suggestions are welcome. Thanks, Paul Watts.

Time machines makes a similar box. However, one would expect that with that many devices at a site one could find a couple of devices which could run a ntp server along with their normal workload. On Thu, Apr 21, 2022, 2:23 AM Paul Watts <rpwatts@gmail.com> wrote: > Long time lurker, first time poster. > > In the past, I've purchased the LeoNTP server to act as a local time server > on my work network. Unfortunately, those NTP servers aren't available to > order. > > I'm in need of two - three more NTP servers for various locations. > > Do any of you have an alternate NTP server recommendation? > > 1. I'd like to keep the price less than $1,000. The Leo's were a great, > self contained choice at less than $400. > 2. Support for IPv4 is required and IPv6 is desired. The main shortcoming I > have with the Leo's is no support for IPv6. > 3. I'll serve about 150 clients per site from a given NTP server. My NTP > clients are a combination of Windows and Linux computers along with various > types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's don't > even breathe hard at that level. > 4. No PTP support is required. My timing needs are IT related - log > consistency, security protocol requirements, etc. > 4. I'm not interested in building and using something like a Raspberry Pi. > I'll be sending these to remote sites and don't want to worry about issues > like memory card failures and the hobbyist feel of many Pi cases and > cooling options. That's fine for my home but not for work. > 5. Availability is important. > > Any suggestions are welcome. > > Thanks, > > Paul Watts. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. >

Thanks for the reply, Forrest. I do have a TM1000(model number?) but I thought they were out of stock. Their website currently claims otherwise and I'll probably get another. I do have systems at each site running NTP against my local LeoNTP devices and the US NTP pool. I just like to have a local source as well as remote. Recently, I learned about the Centerlclick NTP250. Anyone have any experience? On Thu, Apr 21, 2022 at 12:09 Forrest Christian (List Account) < lists@packetflux.com> wrote: > Time machines makes a similar box. > > However, one would expect that with that many devices at a site one could > find a couple of devices which could run a ntp server along with their > normal workload. > > On Thu, Apr 21, 2022, 2:23 AM Paul Watts <rpwatts@gmail.com> wrote: > > > Long time lurker, first time poster. > > > > In the past, I've purchased the LeoNTP server to act as a local time > server > > on my work network. Unfortunately, those NTP servers aren't available to > > order. > > > > I'm in need of two - three more NTP servers for various locations. > > > > Do any of you have an alternate NTP server recommendation? > > > > 1. I'd like to keep the price less than $1,000. The Leo's were a great, > > self contained choice at less than $400. > > 2. Support for IPv4 is required and IPv6 is desired. The main > shortcoming I > > have with the Leo's is no support for IPv6. > > 3. I'll serve about 150 clients per site from a given NTP server. My NTP > > clients are a combination of Windows and Linux computers along with > various > > types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's don't > > even breathe hard at that level. > > 4. No PTP support is required. My timing needs are IT related - log > > consistency, security protocol requirements, etc. > > 4. I'm not interested in building and using something like a Raspberry > Pi. > > I'll be sending these to remote sites and don't want to worry about > issues > > like memory card failures and the hobbyist feel of many Pi cases and > > cooling options. That's fine for my home but not for work. > > 5. Availability is important. > > > > Any suggestions are welcome. > > > > Thanks, > > > > Paul Watts. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > > an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. > -- Paul Watts. rpwatts@gmail.com

Though I don't have a Time Machines NTP server I've monitored them for several years and have seen a number of "off by N-seconds" errors. The manufacturer reproduced the problem and released new firmware for the TM2000B. I don't know the status of other models. I would be hesitant to trust the server when the GPS signal is marginal. I have a local LeoNTP server. Though it uses a different chipset than the Time Machines TMxxxx, it also exhibits off by N-seconds. I've seen similar errors for several other public LeoNTP servers, including some of the ntpX.leontp.com servers. When I degrade the GPS signal the N-second errors become more frequent. A typical NTP server will indicate potential loss of accuracy by setting the alarm bit or increasing root dispersion. The LeoNTP does neither, instead it decreases the NTP "precision" field. [The value itself is bogus.] The machine's physical design is nice, the performance is excellent. I wish the timestamps were more trustworthy. Steve Sommars On Thu, Apr 21, 2022 at 8:20 PM Paul Watts <rpwatts@gmail.com> wrote: > Thanks for the reply, Forrest. > > I do have a TM1000(model number?) but I thought they were out of stock. > Their website currently claims otherwise and I'll probably get another. > > I do have systems at each site running NTP against my local LeoNTP devices > and the US NTP pool. > > I just like to have a local source as well as remote. > > Recently, I learned about the Centerlclick NTP250. Anyone have any > experience? > > On Thu, Apr 21, 2022 at 12:09 Forrest Christian (List Account) < > lists@packetflux.com> wrote: > > > Time machines makes a similar box. > > > > However, one would expect that with that many devices at a site one could > > find a couple of devices which could run a ntp server along with their > > normal workload. > > > > On Thu, Apr 21, 2022, 2:23 AM Paul Watts <rpwatts@gmail.com> wrote: > > > > > Long time lurker, first time poster. > > > > > > In the past, I've purchased the LeoNTP server to act as a local time > > server > > > on my work network. Unfortunately, those NTP servers aren't available > to > > > order. > > > > > > I'm in need of two - three more NTP servers for various locations. > > > > > > Do any of you have an alternate NTP server recommendation? > > > > > > 1. I'd like to keep the price less than $1,000. The Leo's were a great, > > > self contained choice at less than $400. > > > 2. Support for IPv4 is required and IPv6 is desired. The main > > shortcoming I > > > have with the Leo's is no support for IPv6. > > > 3. I'll serve about 150 clients per site from a given NTP server. My > NTP > > > clients are a combination of Windows and Linux computers along with > > various > > > types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's > don't > > > even breathe hard at that level. > > > 4. No PTP support is required. My timing needs are IT related - log > > > consistency, security protocol requirements, etc. > > > 4. I'm not interested in building and using something like a Raspberry > > Pi. > > > I'll be sending these to remote sites and don't want to worry about > > issues > > > like memory card failures and the hobbyist feel of many Pi cases and > > > cooling options. That's fine for my home but not for work. > > > 5. Availability is important. > > > > > > Any suggestions are welcome. > > > > > > Thanks, > > > > > > Paul Watts. > > > _______________________________________________ > > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > > send > > > an email to time-nuts-leave@lists.febo.com > > > To unsubscribe, go to and follow the instructions there. > > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send > > an email to time-nuts-leave@lists.febo.com > > To unsubscribe, go to and follow the instructions there. > > > -- > Paul Watts. > rpwatts@gmail.com > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send > an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. >

FWIW, I have experience with the LeoNTP, TM1000A and TM2000A. The LeoNTP is a very solid NTP server. Highly consistent service, with extraordinary low variance assuming the display is left on the default time screen (other screens negatively impact variance). Standard deviation reported by Chrony using hardware timestamps is in the low 10s of nanoseconds. My TM1000A unfortunately died a couple of years ago. I remember it as a fairly consistent NTP server, with standard deviation in the mid 10s of microseconds. The TM2000As I have are of an older vintage. As a PTP server, these units functioned okay. However as an NTP server, they were really not great. Lots of variance for NTP, and occasionally would wander off by several seconds. I note that there is newer firmware which may address some of the NTP issues, however my hardware appears to be too old to update to the current version so I cannot confirm. I do not have any experience with the TM2000B. Your mileage may vary.

On Thu, Apr 21, 2022 at 9:23 AM Paul Watts <rpwatts@gmail.com> wrote: > > Long time lurker, first time poster. > > In the past, I've purchased the LeoNTP server to act as a local time server > on my work network. Unfortunately, those NTP servers aren't available to > order. > > I'm in need of two - three more NTP servers for various locations. > > Do any of you have an alternate NTP server recommendation? > > 1. I'd like to keep the price less than $1,000. The Leo's were a great, > self contained choice at less than $400. > 2. Support for IPv4 is required and IPv6 is desired. The main shortcoming I > have with the Leo's is no support for IPv6. > 3. I'll serve about 150 clients per site from a given NTP server. My NTP > clients are a combination of Windows and Linux computers along with various > types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's don't > even breathe hard at that level. > 4. No PTP support is required. My timing needs are IT related - log > consistency, security protocol requirements, etc. > 4. I'm not interested in building and using something like a Raspberry Pi. > I'll be sending these to remote sites and don't want to worry about issues > like memory card failures and the hobbyist feel of many Pi cases and > cooling options. That's fine for my home but not for work. > 5. Availability is important. > > Any suggestions are welcome. > > Thanks, > > Paul Watts. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. No connection to them, but these might fit https://www.mouser.com/ProductDetail/NetBurner/PK70EX-NTP?qs=W62KBPEYc70bWh%252BpZOx83Q%3D%3D and mouser appear to have stock. Cheers Arne

I have had one of these running for about 8 months without a burp. Cost effective, and probably available in bulk from the Old Country... On 2022-04-23 14:14, shouldbe q931 wrote: > On Thu, Apr 21, 2022 at 9:23 AM Paul Watts <rpwatts@gmail.com> wrote: >> >> Long time lurker, first time poster. >> >> In the past, I've purchased the LeoNTP server to act as a local time >> server >> on my work network. Unfortunately, those NTP servers aren't available >> to >> order. >> >> I'm in need of two - three more NTP servers for various locations. >> >> Do any of you have an alternate NTP server recommendation? >> >> 1. I'd like to keep the price less than $1,000. The Leo's were a >> great, >> self contained choice at less than $400. >> 2. Support for IPv4 is required and IPv6 is desired. The main >> shortcoming I >> have with the Leo's is no support for IPv6. >> 3. I'll serve about 150 clients per site from a given NTP server. My >> NTP >> clients are a combination of Windows and Linux computers along with >> various >> types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's >> don't >> even breathe hard at that level. >> 4. No PTP support is required. My timing needs are IT related - log >> consistency, security protocol requirements, etc. >> 4. I'm not interested in building and using something like a Raspberry >> Pi. >> I'll be sending these to remote sites and don't want to worry about >> issues >> like memory card failures and the hobbyist feel of many Pi cases and >> cooling options. That's fine for my home but not for work. >> 5. Availability is important. >> >> Any suggestions are welcome. >> >> Thanks, >> >> Paul Watts. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > > No connection to them, but these might fit > https://www.mouser.com/ProductDetail/NetBurner/PK70EX-NTP?qs=W62KBPEYc70bWh%252BpZOx83Q%3D%3D > and mouser appear to have stock. > > Cheers > > Arne > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. ------------ When in trouble, when in doubt, Run in circles, scream and shout. (Naval War College Football Team) ---------------------- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304

I forgot to put the famous number on my response. I've had a cost effective NTP server # 255114568844 running for about 8 months with no problems. On 2022-04-23 14:14, shouldbe q931 wrote: > On Thu, Apr 21, 2022 at 9:23 AM Paul Watts <rpwatts@gmail.com> wrote: >> >> Long time lurker, first time poster. >> >> In the past, I've purchased the LeoNTP server to act as a local time >> server >> on my work network. Unfortunately, those NTP servers aren't available >> to >> order. >> >> I'm in need of two - three more NTP servers for various locations. >> >> Do any of you have an alternate NTP server recommendation? >> >> 1. I'd like to keep the price less than $1,000. The Leo's were a >> great, >> self contained choice at less than $400. >> 2. Support for IPv4 is required and IPv6 is desired. The main >> shortcoming I >> have with the Leo's is no support for IPv6. >> 3. I'll serve about 150 clients per site from a given NTP server. My >> NTP >> clients are a combination of Windows and Linux computers along with >> various >> types of network gear (Cisco, Palo Alto, Aruba, Juniper). The Leo's >> don't >> even breathe hard at that level. >> 4. No PTP support is required. My timing needs are IT related - log >> consistency, security protocol requirements, etc. >> 4. I'm not interested in building and using something like a Raspberry >> Pi. >> I'll be sending these to remote sites and don't want to worry about >> issues >> like memory card failures and the hobbyist feel of many Pi cases and >> cooling options. That's fine for my home but not for work. >> 5. Availability is important. >> >> Any suggestions are welcome. >> >> Thanks, >> >> Paul Watts. >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe >> send an email to time-nuts-leave@lists.febo.com >> To unsubscribe, go to and follow the instructions there. > > No connection to them, but these might fit > https://www.mouser.com/ProductDetail/NetBurner/PK70EX-NTP?qs=W62KBPEYc70bWh%252BpZOx83Q%3D%3D > and mouser appear to have stock. > > Cheers > > Arne > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe > send an email to time-nuts-leave@lists.febo.com > To unsubscribe, go to and follow the instructions there. ------------ When in trouble, when in doubt, Run in circles, scream and shout. (Naval War College Football Team) ---------------------- Dr. Don Latham AJ7LL PO Box 404, Frenchtown, MT, 59834 VOX: 406-626-4304