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[IP] does not exists on log files. Site goes offline and online


On V10 I encountered this problem. The site goes offline, stays for a period of time offline, then it goes online again. I checked log files web.log and I get this message…

Any idea what’s causing this problem?

UPDATE: The strange thing is that it does not work on my work’s network. When I try from my mobile (LTE Data), it works.


Since no one cared to help, I think the problem was from fail2ban . Because of many requests, the server banned my ip.
I ignored my IP on fail2ban config files. And since then, no more issues.