{"id":2303,"date":"2023-01-19T15:46:32","date_gmt":"2023-01-19T14:46:32","guid":{"rendered":"https:\/\/www.nameshield.com\/en\/?page_id=2303"},"modified":"2023-01-19T15:52:07","modified_gmt":"2023-01-19T14:52:07","slug":"dns-failover","status":"publish","type":"page","link":"https:\/\/www.nameshield.com\/en\/glossary\/dns-failover\/","title":{"rendered":"DNS failover"},"content":{"rendered":"\n
<\/span>
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<\/div>\n\n\n
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Failover is a prin\u00adci\u00adple of auto\u00admat\u00adic switchover to a back\u00adup ser\u00advice when the main ser\u00advice is no longer avail\u00adable.<\/p>\n\n\n\n

Applied to the DNS, the Failover ser\u00advice con\u00adsists of mon\u00adi\u00adtor\u00ading DNS Resources Records and switch\u00ading to a back\u00adup record if the main record is no longer avail\u00adable. Dur\u00ading the switch, the main record con\u00adtin\u00adues to be mon\u00adi\u00adtored and when it is avail\u00adable again, a switch back to nor\u00admal is oper\u00adat\u00aded.<\/p>\n\n\n\n

Sur\u00adveil\u00adlance is car\u00adried out by a set of probes dis\u00adtrib\u00aduted over dif\u00adfer\u00adent net\u00adworks and world\u00adwide geo\u00adgraph\u00adi\u00adcal loca\u00adtions. The failover rules are defined upfront, whether it is a num\u00adber of iter\u00ada\u00adtions or a peri\u00adod of time between avail\u00adabil\u00adi\u00adty checks.<\/p>\n\n\n\n

The cus\u00adtomer is informed of the changeover by an email alert, he is also informed of the return to nor\u00admal.<\/p>\n<\/div>\n\n\n\n

\n
\"DNS<\/figure>\n<\/div>\n<\/div>\n\n\n
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