It isn't blocking every IP, only the one you see in the log. The IP belongs to your host. It belongs to another server that sits in front of your web server. All traffic to your site flows through that server first. The other server passes two "from" IPs to your web server, the IP of the other server and the real IP of the visitor. There is a correct order that these IPs should be passed in but LOTS of hosts set them up backwards. So every exception is logged to the other server's address and eventually it gets blocked, which stops all traffic to your web server. Not good. So that's the why part.
To stop it, go to Web Application Firewall, Configure WAF, on the first tab, change the value of IP Workarounds. If it's on, turn it off or vice versa.
Dale L. Brackin
Support Specialist
English: native
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!
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