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Apache SYN Flood Attacks and how to stop / avoid them
This is a discussion on Apache SYN Flood Attacks and how to stop / avoid them within the Web servers forums, part of the Mastering Servers category; Hello, My Apache server is under DOS SYN attack please help? How can we stop attacks? Someone is sending (may ...
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12-20-2006, 04:30 PM
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Apache SYN Flood Attacks and how to stop / avoid them
Hello,
My Apache server is under DOS SYN attack please help? How can we stop attacks? Someone is sending (may be zombies botnet  SYN Flood attacks.  It is Linux server 
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12-21-2006, 04:30 AM
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Type following command to disable SYN flood attacks (SYN cookie
Code:
echo 1 > /proc/sys/net/ipv4/tcp_syncookies Use netstat command to find out connections and drop them using iptables. Code:
iptables -A INPUT -s IP-ADDRESS -p tcp –destination-port 80 -j DROP iptables -A INPUT -s IP-ADDRESS -j DROP
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