check_ntp_peer works now:
Before stopping time server...
# /usr/lib/nagios/plugins/check_ntp_peer -H time.cefetrs.tche.br NTP OK: Offset -0,002 secs|offset=-0,002000s;60,000000;120,000000;
After stopping time server...
# /usr/lib/nagios/plugins/check_ntp_peer -H time.cefetrs.tche.br NTP CRITICAL: No response from NTP server
After starting time server again...
# /usr/lib/nagios/plugins/check_ntp_peer -H time.cefetrs.tche.br NTP CRITICAL: Server not synchronized, Offset unknown|
check_ntp_peer works now:
Before stopping time server...
# /usr/lib/ nagios/ plugins/ check_ntp_ peer -H time.cefetrs. tche.br -0,002000s; 60,000000; 120,000000;
NTP OK: Offset -0,002 secs|offset=
After stopping time server...
# /usr/lib/ nagios/ plugins/ check_ntp_ peer -H time.cefetrs. tche.br
NTP CRITICAL: No response from NTP server
After starting time server again...
# /usr/lib/ nagios/ plugins/ check_ntp_ peer -H time.cefetrs. tche.br
NTP CRITICAL: Server not synchronized, Offset unknown|
# /usr/lib/ nagios/ plugins/ check_ntp_ peer -H time.cefetrs. tche.br -0,002000s; 60,000000; 120,000000;
NTP OK: Offset -0,002 secs|offset=