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ru.unix.bsd
- RU.UNIX.BSD ------------------------------------------------------------------
From : Sergey Titow 2:5020/400 27 Mar 2007 13:37:43
To : All
Subject : Помогите разобраться с NTP
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Hello, All!
Есть локалка. В локалке есть сервак 2к и комп с FreeBSD. В инет ходят через
NAT. Hа эхотаге и гейтвее 6.1-RELEASE-p10. Hа гейтвее PF.
Hа 2k поднят w32time. Hа FreeBSD - openntpd (с ntpd - те же яйца).
Конфиг на 2к:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters]
"LocalNTP"=dword:00000001
"Period"="8"
"type"="NTP"
"ntpserver"="83.229.136.38"
Конфиг на FreeBSD:
listen on *
server 83.229.136.38
2k работает, эхотаг - нет в форме заявления "я стратум 16"...
Если прописать сервером оффтопик - через 10 минут FreeBSD становится стратум
3...
Ntpdate работает...
Вот что говорит tcpdump на внешнем интерфейсе гейтвея при рестарте сервисов
на Фре и 2к:
12:42:08.153611 IP (tos 0x10, ttl 63, id 17648, offset 0, flags [none],
proto:
UDP (17), length: 76) X.X.X.X.adsl-spb.net.rol.ru.63624 >
83.229.136.38.
ntp: [udp sum ok] NTPv4, length 48
Client, Leap indicator: (0), Stratum 0, poll 0s, precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID:
(unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 3673905214.729977617 (2016/06/03 05:13:34)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 3673905214.729977617
(2016/06/03 05:13:34)
12:42:27.061542 IP (tos 0x0, ttl 127, id 29904, offset 0, flags [none],
proto:
UDP (17), length: 76) X.X.X.X.adsl-spb.net.rol.ru.56967 >
83.229.136.38.nt
p: [udp sum ok] NTPv2, length 48
Client, Leap indicator: (0), Stratum 0, poll 14s, precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID:
(unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 3383973773.704999999 (2007/03/27 12:42:53)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 3383973773.704999999
(2007/03/27 12
:42:53)
12:42:27.095359 IP (tos 0x0, ttl 51, id 0, offset 0, flags [DF], proto: UDP
(17
), length: 76) 83.229.136.38.ntp >
X.X.X.X.adsl-spb.net.rol.ru.56967: [ud
p sum ok] NTPv2, length 48
Server, Leap indicator: (0), Stratum 3, poll 14s, precision -20
Root Delay: 0.085754, Root dispersion: 0.029022, Reference-ID:
unknown-1
95-160-166-150.phyxia.net
Reference Timestamp: 3383973626.244516779 (2007/03/27 12:40:26)
Originator Timestamp: 3383973773.704999999 (2007/03/27 12:42:53)
Receive Timestamp: 3383973773.713711742 (2007/03/27 12:42:53)
Transmit Timestamp: 3383973773.713772881 (2007/03/27 12:42:53)
Originator - Receive Timestamp: +0.008711742
Originator - Transmit Timestamp: +0.008772881
12:42:27.095762 IP (tos 0x0, ttl 127, id 21742, offset 0, flags [none],
proto: U
DP (17), length: 76) X.X.X.X.adsl-spb.net.rol.ru.56967 >
83.229.136.38.nt
p: [udp sum ok] NTPv2, length 48
Client, Leap indicator: (0), Stratum 0, poll 14s, precision 0
Root Delay: 0.000000, Root dispersion: 0.000000, Reference-ID:
(unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 3383973773.735999999 (2007/03/27 12:42:53)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 3383973773.735999999
(2007/03/27 12
:42:53)
12:42:27.129805 IP (tos 0x0, ttl 51, id 0, offset 0, flags [DF], proto: UDP
(17
), length: 76) 83.229.136.38.ntp >
X.X.X.X.adsl-spb.net.rol.ru.56967: [ud
p sum ok] NTPv2, length 48
Server, Leap indicator: (0), Stratum 3, poll 14s, precision -20
Root Delay: 0.085754, Root dispersion: 0.029022, Reference-ID:
unknown-1
95-160-166-150.phyxia.net
Reference Timestamp: 3383973626.244516779 (2007/03/27 12:40:26)
Originator Timestamp: 3383973773.735999999 (2007/03/27 12:42:53)
Receive Timestamp: 3383973773.747867850 (2007/03/27 12:42:53)
Transmit Timestamp: 3383973773.747919701 (2007/03/27 12:42:53)
Originator - Receive Timestamp: +0.011867850
Originator - Transmit Timestamp: +0.011919701
Первый пакет - это от FreeBSD.
А вот что происходит там же при ntpdate:
13:17:26.776042 IP (tos 0x0, ttl 128, id 45621, offset 0, flags [none],
proto: UDP (17), length: 76) X.X.X.X.adsl-spb.net.rol.ru.50598 >
83.229.136.38.ntp: [udp sum ok] NTPv4, length 48
Client, Leap indicator: clock unsynchronized (192), Stratum 0, poll
4s, precision -6
Root Delay: 1.000000, Root dispersion: 1.000000, Reference-ID:
(unspec)
Reference Timestamp: 0.000000000
Originator Timestamp: 0.000000000
Receive Timestamp: 0.000000000
Transmit Timestamp: 3383975872.821735719 (2007/03/27 13:17:52)
Originator - Receive Timestamp: 0.000000000
Originator - Transmit Timestamp: 3383975872.821735719
(2007/03/27 13:17:52)
13:17:26.810231 IP (tos 0x0, ttl 51, id 0, offset 0, flags [DF], proto: UDP
(17), length: 76) 83.229.136.38.ntp > X.X.X.X.adsl-spb.net.rol.ru.50598:
[udp sum ok] NTPv4, length 48
Server, Leap indicator: (0), Stratum 3, poll 4s, precision -20
Root Delay: 0.104568, Root dispersion: 0.031143, Reference-ID:
unknown-195-160-166-150.phyxia.net
Reference Timestamp: 3383975675.242266920 (2007/03/27 13:14:35)
Originator Timestamp: 3383975872.821735719 (2007/03/27 13:17:52)
Receive Timestamp: 3383975873.656951719 (2007/03/27 13:17:53)
Transmit Timestamp: 3383975873.657011638 (2007/03/27 13:17:53)
Originator - Receive Timestamp: +0.835215999
Originator - Transmit Timestamp: +0.835275918
Hасколько вижу отличия - openntpd выставляет tos 0x10.
Посему вопросы:
- можно ли заставить ntpd не выставлять tos?
- можно ли заставить pf сбрасывать tos?
- имеются ли здесь основания ругаться с провом и если да, то какие?
With best regards,
Sergey Titow
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* Origin: Golden Telecom (2:5020/400)
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