Today I noticed some of our Central managed APs shown as offline since March but they are up and running.
I did a packet capture on XG and found some syslogs reported by the particular APs. Date and time is totally wrong.
Dec.25.06:46:18.cloudclient[24721]:.curl.c:1029/check_multi_info:.Connection.to.https://wifi-cloudstation-eu-central-1.prod.hydra.sophos.com//api/oauth2/token.failed,.error:.60.(SSL.peer.certificate.or.SSH.remote.key.was.not.OK)
Due to the Time issue, probably the SSL connect is not successful because Cert validity fails.
So now I need someone on site to powercycle the devices...
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