peplink ONE One - Page 66

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HealthCheck
DNSServers
ThisfieldallowsyoutospecifytwoDNShosts’IPaddresseswithwhichconnectivityistobe
testedviaDNSLookup.
IfUsefirsttwoDNSserversasHealthCheckDNSServersischecked,thefirsttwoDNS
serverswillbetheDNSlookuptargetsforcheckingaconnection'shealth.Iftheboxisnot
checked,Host1mustbefilled,whileavalueforHost2isoptional.
IfIncludepublicDNSserversisselectedandnoresponseisreceivedfromallspecified
DNSservers,DNSlookupswillalsobeissuedtosomepublicDNSservers.AWAN
connectionwillbetreatedasdownonlyifthereisalsonoresponsereceivedfromthepublic
DNSservers.
ConnectionswillbeconsideredasupifDNSresponsesarereceivedfromanyoneofthe
healthcheckDNSservers,regardlessofapositiveornegativeresult.Bydefault,thefirst
twoDNSserversoftheWANconnectionareusedasthehealthcheckDNSservers.
HealthCheckMethod:HTTP
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HTTPconnectionswillbeissuedtotestconnectivitywithconfigurableURLsandstringstomatch.
URL1
WANSettings>WANEdit>HealthCheckSettings>URL1
TheURLwillberetrievedwhenperforminganHTTPhealthcheck.WhenStringtoMatch
isleftblank,ahealthcheckwillpassiftheHTTPreturncodeisbetween200and299
(Note:HTTPredirectioncodes301or302aretreatedasfailures).WhenStringtoMatchis
filled,ahealthcheckwillpassiftheHTTPreturncodeisbetween200and299andifthe
HTTPresponsecontentcontainsthestring.
URL2
WANSettings>WANEdit>HealthCheckSettings>URL2
IfURL2isalsoprovided,ahealthcheckwillpassifeitheroneofthetestspassed.
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