Bug 233922

Summary: ntpdate: no server suitable for synchronization found
Product: Base System Reporter: David Naylor <dbn>
Component: binAssignee: freebsd-bugs (Nobody) <bugs>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: ---    
Version: 11.2-RELEASE   
Hardware: Any   
OS: Any   

Description David Naylor freebsd_committer freebsd_triage 2018-12-11 07:54:42 UTC
I am unable to synchronize my computers time using ntpdate(8) or ntpd(8).  
# sudo ntpdate 0.freebsd.pool.ntp.org
11 Dec 09:51:58 ntpdate[40755]: no server suitable for synchronization found

And yet using the debug mode does not suggest anything is actually wrong:
# sudo ntpdate -d 0.freebsd.pool.ntp.org
11 Dec 09:52:29 ntpdate[40757]: ntpdate 4.2.8p11-a (1)
transmit(45.222.43.250)
receive(45.222.43.250)
transmit(196.10.52.58)
receive(196.10.52.58)
transmit(45.222.43.250)
receive(45.222.43.250)
transmit(196.10.52.58)
receive(196.10.52.58)
transmit(45.222.43.250)
receive(45.222.43.250)
transmit(196.10.52.58)
receive(196.10.52.58)
transmit(45.222.43.250)
receive(45.222.43.250)
transmit(196.10.52.58)
receive(196.10.52.58)
server 45.222.43.250, port 123
stratum 2, precision -23, leap 00, trust 000
refid [45.222.43.250], delay 0.04274, dispersion 0.00192
transmitted 4, in filter 4
reference time:    dfb9ea38.cf51ef78  Tue, Dec 11 2018  9:48:08.809
originate timestamp: dfb9eb8e.e7ddd3d7  Tue, Dec 11 2018  9:53:50.905
transmit timestamp:  dfb9eb46.a68c1b0e  Tue, Dec 11 2018  9:52:38.650
filter delay:  0.04597  0.04274  0.04597  0.04797 
         0.00000  0.00000  0.00000  0.00000 
filter offset: 72.23768 72.23831 72.24198 72.24396
         0.000000 0.000000 0.000000 0.000000
delay 0.04274, dispersion 0.00192
offset 72.238316

server 196.10.52.58, port 123
stratum 2, precision -24, leap 00, trust 000
refid [196.10.52.58], delay 0.04701, dispersion 0.00711
transmitted 4, in filter 4
reference time:    dfb9e8b5.7b3dfb1b  Tue, Dec 11 2018  9:41:41.481
originate timestamp: dfb9eb8f.1b55237d  Tue, Dec 11 2018  9:53:51.106
transmit timestamp:  dfb9eb46.d8834d5f  Tue, Dec 11 2018  9:52:38.845
filter delay:  0.07347  0.04701  0.07225  0.05682 
         0.00000  0.00000  0.00000  0.00000 
filter offset: 72.25234 72.24034 72.25283 72.24537
         0.000000 0.000000 0.000000 0.000000
delay 0.04701, dispersion 0.00711
offset 72.240342

11 Dec 09:52:38 ntpdate[40757]: step time server 45.222.43.250 offset 72.238316 sec
Comment 1 David Naylor freebsd_committer freebsd_triage 2018-12-11 08:01:27 UTC
Apologies for the noise - it is an ISP issue that blocks packets to privilaged ports.  Using `ntpdate -u 0.freebsd.pool.ntp.org` fixes the problem.