[HELP] High memory usage on the server

[damnyou]

Right now my server is experiencing a high memory usage and no website is opening. The kloxo page is showing 500 - Internal Server error

The website was working fine few mins back.

Is it some kind of ddos?

damnyou Reviewed by damnyou on 15th Mar 2012. [HELP] High memory usage on the server Right now my server is experiencing a high memory usage and no website is opening. The kloxo page is showing 500 - Internal Server error The website was working fine few mins back. Is it some kind of ddos? http://i.imgur.com/KtBQw.png Rating: 5

[trace]

Maybe its a DDOS (I am not sure)
Try restarting httpd
service httpd restart

[damnyou]

Yes, it was ddos specifically targeted to bring down the httpd(apache) process. Changed it to lighty for the time being.

[jibinthomas]

You can use the following command to identify the network of IPs which caused the problem.
nestat -plan | grep 80 | awk {'print $5'} | cut -d: -f1 | sort | uniq -c | sort -n

[damnyou]

You can use the following command to identify the network of IPs which caused the problem.
nestat -plan | grep 80 | awk {'print $5'} | cut -d: -f1 | sort | uniq -c | sort -n

Thanks for the command. There were around 2k ips attacking the server and those who think cloudflare can protect their sites should reconsider their statements

[DJboutit]

Are running any torrent or rapidleech scripts if you are deleted them

[damnyou]

@ DJboutit
No, no torrent or rapidleech scripts. Only vbulletin script. As mentioned earlier, it was a http flood on the webpage which sucked 8 gb of server's bandwidth within few mins. Now running the site on the lighthttpd server. I'll look for some good ddos protection. Crazy competitors oh well....

[accyuklad]

you using cloudflare worth a try

[prateek]

yes
register with www.cloudflare.com and prevent all the ddos attacks

features of cloudflare
save bandwidth
hide ur hosting provider's details
reduce number of requests
minify java scripts and css
prevent DDOs attacks
make ur site faaaaast!!

[damoncloudflare]

Thanks for the command. There were around 2k ips attacking the server and those who think cloudflare can protect their sites should reconsider their statements

We actually can help mitigate most DDoS attacks (not all). These tips might help you if you're getting a DDoS attack & you're using CloudFlare.