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Ahoj, prosím o radu odborníky. Marně si lámu hlavu s NTP serverem na mám Debian 11 serveru. Problém je v tom že ntp server žádný broadcast neposílá a ani se neaktualizuje s public ntp servery. Přikládám konfiguraci ntp.conf

# /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help

driftfile /var/lib/ntp/ntp.drift

# Leap seconds definition provided by tzdata
leapfile /usr/share/zoneinfo/leap-seconds.list

# Enable this if you want statistics to be logged.
statsdir /var/log/ntpstats/
logfile /var/log/ntp.log
logconfig =all

statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable


# You do need to talk to an NTP server or two (or three).
#server ntp.your-provider.example
server tik.cesnet.cz
server tak.cesnet.cz
server ntp.nic.cz

# pool.ntp.org maps to about 1000 low-stratum NTP servers.  Your server will
# pick a different set every time it starts up.  Please consider joining the
# pool: 
#pool 0.debian.pool.ntp.org iburst
#pool 1.debian.pool.ntp.org iburst
#pool 2.debian.pool.ntp.org iburst
#pool 3.debian.pool.ntp.org iburst


# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details.  The web page 
# might also be helpful.
#
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.

# By default, exchange time with everybody, but don't allow configuration.
restrict -4 default kod notrap nomodify nopeer noquery limited
restrict -6 default kod notrap nomodify nopeer noquery limited

# Local users may interrogate the ntp server more closely.
restrict 127.0.0.1
restrict ::1

# Needed for adding pool entries
restrict source notrap nomodify noquery

# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict 192.168.123.0 mask 255.255.255.0 notrust
restrict 192.168.0.0 mask 255.255.255.0 nomodify notrap nopeer

# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)
broadcast 192.168.0.255

# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines.  Please do this only if you trust everybody on the network!
#disable auth
#broadcastclient

Výpis ntpq -p mě vypíše toto:

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 gw.sh.cvut.cz   .INIT.          16 u    -  512    0    0.000   +0.000   0.000
 147.32.127.250  .INIT.          16 u    -  512    0    0.000   +0.000   0.000
 192.168.0.255   .BCST.          16 B    -   64    0    0.000   +0.000   0.000

Firewall pravidlo pro interni sit mam nastavene a klienti se snazi kontaktovat ntp server ale nedostanou odpoved.

Server provozuji na HW PCengines APU4D4 a mám podezření na HW hodiny daného zařízení. Nevím ale jak toto zjistit. Budou rád za případnou radu. Děkuji.