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Server shoutdown
| Posted by Markovic, 10-11-2009, 02:53 AM |
| Hello,
I'm getting DDoS'd and my VPS provider suspends my VPS every time when it happens. How could I make in bash scripting to if there is more than 500 connections to the server to server just shoutdown. And to check every 1 min for connections(cron)?
Thanks
|
| Posted by TheServerExperts, 10-11-2009, 02:57 AM |
| Did you already try
http://deflate.medialayer.com/
Cheers
|
| Posted by Markovic, 10-11-2009, 03:55 AM |
| Yes, it fails because the attack is too big. I didn't ask for ddos protection, I tried almost everything, If you know, please answer at my 1st question
|
| Posted by Markovic, 10-11-2009, 10:47 AM |
| I coded this but it fails:
#!/bin/sh
function DDoS {
netstat -ntu | awk '{print $10}' | cut -d: -f1 | sort | uniq -c | sort -n
}
if [ DDoS > 500 ]; then
/sbin/poweroff
fi
I got an error: ./ddos.sh: line 7: [: DDOS: integer expression expected
Any suggestions?
|
| Posted by nomankhn, 10-11-2009, 11:52 AM |
| you cant use function like that better use like that.
|
| Posted by Markovic, 10-11-2009, 12:00 PM |
| If I put touch test instead of poweroff, whatever I put < or > it creates test file. What's wrong?
|
| Posted by nomankhn, 10-11-2009, 12:34 PM |
| Please post script that is in your mind.
|
| Posted by Markovic, 10-11-2009, 02:01 PM |
| Hello,
I got the script to work but I have the problem with cron now.
here is the output of crontab -l:
# m h dom mon dow command
0-59/1 * * * * root /root/ddos.sh
The script is supposed to run every 1 minute, ddos .sh is chmoded to 755. Only for testing purposes I set the script to send an email of there is less than 500 connections to the server. When I run it like ./ddos.sh it sends en email but itt's supposed to be running every 1 minute via cron and it's not sending me emails and it makes me think the script isn't even start by cron. I restarted cron after I added the script in it and cron is running, I checked via ps aux.
Any help would be appreciated
|
| Posted by nomankhn, 10-11-2009, 02:10 PM |
| cron seems ok , i use below cron anyway.
*/1 * * * * root /root/ddos.sh
its better you post your script, you can pm script if you dont want to post on thread, i am not sure where the problem is without seeing script.
|
| Posted by Markovic, 10-11-2009, 02:24 PM |
| bin/sh
ddos=`/bin/netstat -ntu | awk '{print $10}' | cut -d: -f1 | sort | uniq -c | sort -n`
if [ $ddos -lt 500 ]; then
echo "test" | sendmail -s maemail@gmail.com
fi
When I execute it like ./ddo.sh it works, but in cron it doesn't work. Pretty weird
|
| Posted by nomankhn, 10-11-2009, 02:34 PM |
| Please check below one.
|
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