I'm pretty much stumped here. At this client there is a pfsense firewall. Roughly once month a service website that controls 2 major parts of the business will not connect. Can't even ping to the websites IP. BUT. If you either change the WANs IP to another in the range they own, or switch to the backup ISP, the website works.
And the ONLY setting being changed is the Wan IP. literally everything else is kept the same. Because of the hybrid O365 setup here I can't leave the Ip changed.
The weirdest part is after a few hours it just works again on the old IP.
The most I got from the support for that service is "Well don't use that Ip address then"
Any ideas are appreciated.
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