Host :
Hello,
I'm sorry, but it will not be possible to put fail2ban for you, we do not install the software at the request of customers.
The loadbalancers are behind our anti-DDoS software, so it's not possible to change anything, because it applies to all customers. Plus, our anti-DDoS software can not do anything in this case, it's not a DDOS attack just someone trying to log in very often. Finally, our anti-DDoS software is not one by fire, its rules apply only in case of mitigation.
Regards,
... in this case, IPB can provide some rules or filter that can help. I think it will be usefull.