My site has been attacked by SYN Flood

[chipve]

Hi all , yesterday , My site has been attacked by SYN Flood and my vps has been suspend , when i support , they opened my vps but still flooded with syn so suspend again , Can you help me

chipve Reviewed by chipve on 15th Oct 2012. My site has been attacked by SYN Flood Hi all , yesterday , My site has been attacked by SYN Flood and my vps has been suspend :facepalm:, when i support , they opened my vps but still flooded with syn so suspend again :facepalm: , Can you help me :( Rating: 5

[DoggY DuKe]

DDOS.. Hmmm. Tell them to change your server IP is the only way to get rid of this ongoing attack.

Damn those ddosers..

[Ifirst]

Note: You may not have the privileges to do these steps on vps , forward it to your vps provider
Add the following lines to your /etc/sysctl.conf file

# Prevent against the common 'syn flood attack'
net.ipv4.tcp_syncookies = 1

What it does ?
Prevent against syn flood
After you modify the file , type this command in ssh to load new settings

sysctl -p

Hope i helped

[Gavo]

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