We've got a RedLion industrial controller which uses SNTP but doesn't seem to receive a response from either an AD domain controller or from ntpd 4.2.7p136 on linux.
tcpdump shows the packets arriving but no response is sent. I'm not sure of the best way to debug this so tried root@kolanut# /opt/ntp/bin/ntpd -g -D 100 2>&1 | grep 10.24.33.98 read_network_packet: fd=23 length 52 from 10.24.33.98 receive: at 1 130.102.2.123<-10.24.33.98 flags 19 restrict 190 receive: at 1 130.102.2.123<-10.24.33.98 mode 3 keyid 00000000 len 52 auth 3 Nearly all the fields are ignored, so what's causing ntpd not to respond ? Key ID ?, stratum of 0 as KOD but v3 client ? REQUEST FROM RED-LION as displayed in wireshark ==================================================== Network Time Protocol Flags: 0x1b 00.. .... = Leap Indicator: no warning (0) ..01 1... = Version number: NTP Version 3 (3) .... .011 = Mode: client (3) Peer Clock Stratum: unspecified or unavailable (0) Peer Polling Interval: invalid (0) Peer Clock Precision: 1.000000 sec Root Delay: 0.0000 sec Root Dispersion: 0.0000 sec Reference Clock ID: NULL Reference Clock Update Time: NULL Originate Time Stamp: NULL Receive Time Stamp: NULL Transmit Time Stamp: Jul 18, 2011 07:56:18.504990 UTC Key ID: 00000000 REQUEST FROM LINUX SNTP UTILITY ==================================================== Network Time Protocol Flags: 0x1b 00.. .... = Leap Indicator: no warning (0) ..01 1... = Version number: NTP Version 3 (3) .... .011 = Mode: client (3) Peer Clock Stratum: secondary reference (15) Peer Polling Interval: 8 (256 sec) Peer Clock Precision: 1.000000 sec Root Delay: 0.0000 sec Root Dispersion: 0.0000 sec Reference Clock ID: 0.0.0.0 Reference Clock Update Time: NULL Originate Time Stamp: NULL Receive Time Stamp: NULL Transmit Time Stamp: Jul 18, 2011 09:17:32.544954 UTC pidfile /var/run/ntpd.pid driftfile /var/lib/ntp/drift peer ntp0.uq.edu.au iburst prefer peer ntp1.uq.edu.au iburst peer ntp3.uq.edu.au iburst server time-B.timefreq.bldrdoc.gov iburst server time.nist.gov iburst server ntp.adelaide.edu.au iburst server ntp0.cs.mu.oz.au iburst server ntp.thistledown.com.au iburst # in au.pool.ntp.org server 2001:6b0:17:f0a0::11 iburst # timehost.lysator.liu.se GPS server 2610:8:7800:0:211:85ff:fe5c:c399 iburst # otc1.psu.edu WWV (was ntp3) server 2001:470:0:50::2 iburst # clock.fmt.he.net CDMA server 2001:1488:cde0::1 iburst # ntp.nic.cz GPS server 2001:12ff:0:7::186 iburst # a.st1.ntp.br IRIG server 2001:67c:21c::3 iburst # ntp.amnic.net GPS server 2001:628:2030:dcf1::ac0 iburst # ts1.aco.net DCF77 (Austria) server 2001:44b8:1::1 iburst # ntp.on.net [internode] server 2001:470:1f0f:b4:123::1 iburst # ipv6.tick.mattnordhoff.com restrict default nomodify notrap nopeer _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
