nagios check_dns check_dig

https://github.com/nagios-plugins/nagios-plugins

FreeBSD pkg は check_dig が入る

https://www.freshports.org/net-mgmt/nagios-plugins/

Examples:
 check_dig -H DNSSERVER -l www.example.com -A "+tcp"
 This will send a tcp query to DNSSERVER for www.example.com

例

/usr/local/libexec/nagios/check_dig -H 8.8.8.8 -l www.yahoo.com
DNS OK - 0.006 seconds response time (www.yahoo.com. 42 IN CNAME me-ycpi-cf-www.g06.yahoodns.net.)|time=0.005891s;;;0.000000

check_dns

checkcommands.cfgで

define command{
        command_name    check_dns
        command_line    $USERa$/check_dns -H www.yahoo.co.jp -s $HOSTADDRESS$
        }

nagiosのcheck_dns www.yahoo.comの不調？ : blog.nomadscafe.jp 2004