I believe so.
May 25 14:26:50.617 KST %STKUNIT1-M:CP %NTP-6-NTPD: receive: KoD packet from 203.248.240.140 has inconsistent xmt/org/rec timestamps. Ignoring.   these logs are updated periodcally(10~25 logs per 1 day) so that i can't see other log for this device.   what should I check? thanks.
KOD packets from NTP server