Actually we checked and mysql was down. Our server is Apache on CentOS. I checked on the internet for this and found that I should whitelist the MYsql DB ip in cphulk database. After doing this much again the server went down and we got the following error from logs: Brute force detection active: 580 LOGIN DENIED - TOO MANY FAILURES - IP TEMP BANNED
What can be root cause ? and what does this error means ?