6.6.6
DDOS Prevention
6.6.6.1
SYN Flood Protection
SYN Flood Protection allows you to protect from attack that exploits part of the normal TCP three-way handshake
to consume resources on the targeted server and render it unresponsive. Essentially, with SYN flood DDoS, the offender
sends TCP connection requests faster than the targeted machine can process them, causing network saturation.
Field Name
Sample value
Explanation
1. Enable SYN flood
protection
Enable/Disable
Makes router more resistant to SYN flood attacks.
2. SYN flood rate
“25”
Set rate limit (packets/second) for SYN packets above
which the traffic is considered a flood.
3. SYN flood burst
“50”
Set burst limit for SYN packets above which the traffic is
considered a flood if it exceeds the allowed rate.
4. TCP SYN cookies
Enable/Disable
Enable the use of SYN cookies(particular choices of initial
TCP sequence numbers by TCP servers).
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