Our sysadmin says you are hitting firewall rate limits:
To keep people from flooding it and killing uhandler and apache there
is a limit of 20 new connections to 80/443 in 1 second and a max of
50 over 7 seconds. He is consistently hitting this limit due to his
flooding of stats from one or more private nodes
After hitting these firewall rules 100 times in an hour fail2ban will ban
you for 2 hours. You really have to be flooding the hell out if stats like
he is to trigger this rule and ban action