At roughly 6PM EST time we started expiriencing network issues due to some sort of attack on our load balancer. Our firewall is dropping given requests, but it's too busy doing it's work, which causes service disruption.
We've been down for rougly 20 minutes, attack stopped, but it started happening again. Sysadmin team is on the issue.
EDIT: After another attack that caused about 8 minutes of downtime, we look stable now. One firewall rule was changed from REJECT to DROP, and NTP was disabled. Both of changes helped.