The problem I am facing is that my Website (hosted on a dedicated VPS) was working fine for last 6 months. However from last two days, it gets huge spikes of DATA coming in and this causes server to crash. The hosting company shutdowns my server. I have tried bringing my website back multiple time but each time after some time same thing happens.
Regarding Dos Attack or other malicious tools, I would like to say that I am using:
Fail2Ban (for ssh and apache) Mod_Security (apache) Mod_Evasive (apache)
However there is not any solid ATTACK coming on the server.
The website is about a URL shortener.
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- Details: OS: Centos 6.5 Processor:
- Intel Hexa-Core Xeon E5-2420
- Processor speed: 2GHZ
- Number of CPUs: 2
- Number of cores: 6
- RAM: 8GB
- Hard disks : 4 × 1TB
**
What can be the issue ?
Please guide me, I am a newbie. Have searched a lot of articles on INTERNET already but nothing is saving me at the moment ?
Update 1 Bandwidth usage image: http://oi57.tinypic.com/206fotk.jpg
Update 2 Also, the logs file generated by Apache server are to big e.g: 1. /etc/var/log/httpd/access_log (15GB) 2. /etc/var/log/httpd/error_log (5GB)
is this normal ?
Update 3 Formatted the complete Website. Reinstalled Ubuntu 12 LTS this... After 1 hour, the website went offline however this time there was no spike !!! I have contacted hosting company (THE LEASE WEB) but no response from them yet :-/