I have a question, I noticed that on the loopback (lo0) NTP requests rush through every second.
Is this normal behavior? I came across it when I wanted to forward all ntp requests to the OPNSense. This works wonderfully and for the lo0 it makes no difference whether the forward rules are on or off.
Thanks for reading.
So, if I kill the ntp-service, then only the Code 2 read command without the response is left.
What tests the ntp-variables so frequently?
Full info:
read
Frame 7: 44 bytes on wire (352 bits), 44 bytes captured (352 bits) on interface -, id 0
Null/Loopback
Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1
User Datagram Protocol, Src Port: 21338, Dst Port: 123
Network Time Protocol (NTP Version 2, control)
Flags: 0x16, Leap Indicator: no warning, Version number: NTP Version 2, Mode: reserved for NTP control message
Flags 2: 0x02, Response bit: Request, Opcode: read variables
Sequence: 1
[Response In: 8]
Status: 0x0000
AssociationID: 0
Offset: 0
Count: 0
response
Frame 8: 436 bytes on wire (3488 bits), 436 bytes captured (3488 bits) on interface -, id 0
Null/Loopback
Internet Protocol Version 4, Src: 127.0.0.1, Dst: 127.0.0.1
User Datagram Protocol, Src Port: 123, Dst Port: 21338
Network Time Protocol (NTP Version 2, control)
Flags: 0x16, Leap Indicator: no warning, Version number: NTP Version 2, Mode: reserved for NTP control message
Flags 2: 0x82, Response bit: Response, Opcode: read variables
Sequence: 1
[Request In: 7]
[Delta Time: 0.000136000 seconds]
Status: 0x0615, Leap Indicator: no warning, Clock Source: UDP/NTP, System Event Code: clock synchronized
AssociationID: 0
Offset: 0
Count: 392
Data
version="ntpd 4.2.8p15@1.3728-o Mon Jul 25 03:38:19 UTC 2022 (1)"
processor="amd64"
system="FreeBSD/13.1-RELEASE-p5"
leap=0
stratum=4
precision=-23
rootdelay=26.611
rootdisp=89.823
refid=185.11.138.90
reftime=0xe7624e9c.f1d5789c
clock=0xe7624ea1.3f65b643
peer=54765
tc=6
mintc=3
offset=-3.960432
frequency=-26.606
sys_jitter=4.671442
clk_jitter=1.115
clk_wander=0.001