NTP - poor reach after 20 hours
-
^ yeah this a normal sort of status you should be seeing.
edit: That is some really low delays.. nice!
-
My pfSense
I use pfSense pool for pfSense.
But selected servers for my Linux.
n1.taur.dk is a friend of mine (also a time-nut) , his server is always "spot on"
My linux usually switches between n1.taur & the swedish one./Bingo
-
yeah those are some really nice low delays - have a nice internet connection ;)
-
@johnpoz
switched over to pfsense.pool 90 min. ago. Here is status so far:[2.5.0-RELEASE][admin@pfsense.home]/var/log: ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== 0.pfsense.pool. .POOL. 16 p - 64 0 0.000 +0.000 0.000 time.nullrouten 132.163.97.1 2 u 713 256 344 62.225 +0.955 0.504 +tick.nde.unlv.e 98.150.140.243 2 u 390 128 204 71.450 -7.756 2.534 +165.227.106.11 200.98.196.212 2 u 673 128 240 40.571 -0.168 3.267 *vps1.n1.ca 216.218.192.202 2 u 981 128 200 69.463 +1.543 2.424 -
-
There's quite a bit of jitter on your selected peer.
It' only won because it's a Stratum 1./Bingo
-
@bingo600 subject of thread is 'poor' reach not 'porn' reach.
-
@johnpoz
i updated from 2.5.0 to 2.5.1. Here is NTP status after 90 minutes after reboot. Hopefully the Scandinavian guys won't try and shame me again with their impressive NTP output.[2.5.1-RELEASE][admin@pfsense.home]/var/log: ntpq -pcrv remote refid st t when poll reach delay offset jitter ============================================================================== 0.pfsense.pool. .POOL. 16 p - 64 0 0.000 +0.000 0.000 +unifi.versadns. 71.66.197.233 2 u 632 128 120 42.354 -2.973 1.580 *clock.nyc.he.ne .CDMA. 1 u 453 128 144 37.191 +1.439 1.048 associd=0 status=0618 leap_none, sync_ntp, 1 event, no_sys_peer, version="ntpd 4.2.8p15@1.3728-o Fri Feb 5 22:07:56 UTC 2021 (1)", processor="amd64", system="FreeBSD/12.2-STABLE", leap=00, stratum=2, precision=-21, rootdelay=37.191, rootdisp=476.256, refid=209.51.161.238, reftime=e4233dba.ae57b7eb Thu, Apr 15 2021 18:33:30.681, clock=e42344a7.e24f1d1b Thu, Apr 15 2021 19:03:03.884, peer=60391, tc=7, mintc=3, offset=+1.048514, frequency=+38.158, sys_jitter=4.679301, clk_jitter=1.975, clk_wander=0.060 -
A couple of the connections we have.
-
Try changing pools
Changed mine from dk, se, no to 0,1,2,3.europe.pool.ntp.org
It bettered the jitter quite considerably.
-
@cool_corona
I'll try going back to multiple pool servers (.us.pool.ntp.org) - hopefully that will improve my current situation (status after 19 hours):[2.5.1-RELEASE][admin@pfsense.home]/var/log: ntpq -pcrv remote refid st t when poll reach delay offset jitter ============================================================================== 0.pfsense.pool. .POOL. 16 p - 64 0 0.000 +0.000 0.000 +tock.sol.net 206.55.64.77 3 u 41m 512 20 37.120 +1.937 1.621 -4.53.160.75 (ns 75.76.123.222 3 u 1722 512 70 26.891 +3.313 1.226 *frigg.fancube.c 107.46.198.112 2 u 1581 512 44 43.347 +3.275 2.363 associd=0 status=0618 leap_none, sync_ntp, 1 event, no_sys_peer, version="ntpd 4.2.8p15@1.3728-o Fri Feb 5 22:07:56 UTC 2021 (1)", processor="amd64", system="FreeBSD/12.2-STABLE", leap=00, stratum=3, precision=-21, rootdelay=49.680, rootdisp=77.172, refid=154.16.245.246, reftime=e4240ee1.afd0e2c4 Fri, Apr 16 2021 9:25:53.686, clock=e424150e.f3e02c84 Fri, Apr 16 2021 9:52:14.952, peer=60404, tc=9, mintc=3, offset=+1.958787, frequency=+37.805, sys_jitter=1.230244, clk_jitter=3.129, clk_wander=0.225 -
Make sure your logging your ntp, in the ntp settings.
And look for if ntp is seeing a spike and or resetting for other reasons. Your reaches should be 377, or maybe 1 packet missed now and then, or even a couple..
Those are horrible reach values.. And to be honest, the numbers don't even seem right.. Unless ntp is restarting or you missing a lot of packets..
You shouldn't see numbers like that, unless ntp has reset/restarted and is just starting... Or your loosing a lot of packets in a row..
20 for example, means that you have just restarted and you got 1 packet out of the last 5
10000 = 20 octal
So you have missed the last 4 packets after you got one, and before that you didn't have any.. Or 3 before that was missed 00010000
You really should never see a 20 as it starts up, because it wouldn't count up like that if your getting responses..
Your counts should be
1 = 1
11 = 3
111 = 7
1111 = 17
11111 = 37
111111 = 77
1111111 = 177
11111111 = 377Your reach values are pointing to a lot of unanswered queries..
your 44 value for example would be this for the last 8 packets..
00100100
So your only getting 1 out of every 3 queries?
70 = 00111000
So you got 3 in a row, and then last 3 nothing..
-
@johnpoz
I enabled the two logging options. here are the last 15 - not sure if 'unreachable' lines are a concern or normal.[2.5.1-RELEASE][admin@pfsense.home]/var/log: cat ntpd.log | tail -15 Apr 16 11:45:37 pfsense ntpd[76193]: Soliciting pool server 142.147.92.5 Apr 16 11:45:41 pfsense ntpd[76193]: 69.89.207.99 101a 8a sys_peer Apr 16 11:45:41 pfsense ntpd[76193]: 45.79.51.42 0014 84 reachable Apr 16 11:46:44 pfsense ntpd[76193]: Soliciting pool server 209.50.63.74 Apr 16 11:47:52 pfsense ntpd[76193]: Soliciting pool server 142.147.92.5 Apr 16 11:49:02 pfsense ntpd[76193]: Soliciting pool server 75.76.123.222 Apr 16 11:49:02 pfsense ntpd[76193]: 75.76.123.222 0011 81 mobilize assoc 33714 Apr 16 11:49:03 pfsense ntpd[76193]: Soliciting pool server 184.105.182.7 Apr 16 11:49:03 pfsense ntpd[76193]: 75.76.123.222 0014 84 reachable Apr 16 11:50:12 pfsense ntpd[76193]: Soliciting pool server 172.86.181.78 Apr 16 11:51:18 pfsense ntpd[76193]: Soliciting pool server 72.14.181.128 Apr 16 11:52:25 pfsense ntpd[76193]: Soliciting pool server 213.32.40.221 Apr 16 11:52:38 pfsense ntpd[76193]: 216.177.181.129 0014 84 reachable Apr 16 11:54:29 pfsense ntpd[76193]: 69.89.207.99 0613 83 unreachable Apr 16 11:55:52 pfsense ntpd[76193]: 45.79.51.42 0013 83 unreachable -
your prob going to want to look at more than the last 15 entries..
But unreachable isn't good no..
You can tell from your reach numbers your having a real hard time getting responses from the ntp your trying to talk too..
Those numbers your showing for reach values are not indicative of good connectivity.. Take your numbers and convert the octal number to a 8 digit binary and you can see response or no response for the last 8 you have sent.. To that specific IP.. When you are seeing the numbers you are seeing.. You have hard time talking to those ntp servers.. Be it they are not getting your query, or they are not just answering.. But those reach numbers are not good for keeping good time..
edit:
Maybe vs using pool, try some specific one that are in your geographic area
https://support.ntp.org/bin/view/Servers/StratumOneTimeServers
https://support.ntp.org/bin/view/Servers/StratumTwoTimeServersThere are plenty of ntp you can specific point to on the net.. You normally want something close as possible to you, to min the delay. But you for sure need something you can reliably talk too..
Add say time.cloudflare.com
They have like 180+ locations via anycast.. You should be able to hopefully talk to something reliable via that..
https://developers.cloudflare.com/time-services/ntp/usage -
@johnpoz
Changed to 5 individual servers closest to me. Here is status after 20 minutes:[2.5.1-RELEASE][admin@pfsense.home]/var/log: ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== time.cloudflare .INIT. 16 u - 512 0 0.000 +0.000 0.000 rolex.netservic .INIT. 16 u - 512 0 0.000 +0.000 0.000 rb.steadfastdns 208.100.0.253 2 u 176 64 74 18.244 +0.095 1.642 time.skylineser .INIT. 16 u - 512 0 0.000 +0.000 0.000 *ntp.your.org 204.9.51.33 2 u 701 64 0 20.320 +0.466 0.460 -
Those are not working ;)
Your isp blocking ntp?
The only one your talking to at all with a reach of 74?
so 00111100..
-
@johnpoz
how can i determine if isp is blocking ntp? There is some 123 traffic on WAN interface getting blocked - not sure if due to isp.I tried to upload image to make things easier for you to troubleshoot, but received notification "something went wrong while parsing server response netgate"
-
@johnpoz
upload works on diffeerent browser (firefox-yes, brave no-go)
-
@farmerjohn said in NTP - poor reach after 20 hours:
There is some 123 traffic on WAN interface getting blocked - not sure if due to isp.
Yeah doesn't sound good.. If that was your return answer from your ntp query..
As to tell if its an isp/internet issue - would sniff on your wan, you would see your ntp queries go out - but never get a response in your sniff. As to that being your isp blocking, or just getting lost in the internet, or the place your trying to talk not answering you - that is the question..
Do you have a vps or something you can fire up, and run ntp server on it - and see if you can talk to that?
If you get a glitch trying to post an image, try again in a few minutes. In the past I have had issues posting images, but try again in few minutes and normally works.
Are you noticing any other issues with your internet connection. Are your states resetting? If your states reset, then yeah return of a ntp query would be blocked because there is no state to allow the traffic back in. Yeah udp is not stateful ;) But pf keeps track of it via a state entry..
edit: Are any of those IPs of NTP servers your trying to talk too?
Doesn't look like it because the source port is not 123.. Looks like they are asking you for ntp.. Do you have your IP listed in the ntp pool or something?
An intelligent man is sometimes forced to be drunk to spend time with his fools
If you get confused: Listen to the Music Play
Please don't Chat/PM me for help, unless mod related
SG-4860 24.03 | Lab VMs 2.7.2, 24.03 -
Just looked up the 123.170.x.x's
I doubt they are NTP ansvers
Seems like CN "probes"
/Bingo
