https://nss.dnc.global/DNS-monitoring-rules.html NSS allows you to regularly send a DNS query, waits for a response and interprets it by applying rules. If an error situation is detected, NSS generates an alert. The DNS watch rules offered by NSS Lite allow you to verify all aspects of the DNS configuration of the domain in question, in addition to checking response time. Requête DNS A DNS request is entered in the "Request" field of the task in the format: dns: [//[:] /] [? ] where : server: (optional) URL of a particular DNS server. (...) en SPIP - www.spip.net