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Possible SYN Flooding


$ sudo vim /etc/sysctl.conf
net.ipv4.tcp_syncookies = 0

Check net.ipv4.tcp_syncookies value
$ sysctl net.ipv4.tcp_syncookies
net.ipv4.tcp_syncookies = 1

Reload sysctl.conf
$ sudo sysctl --system
* Applying /etc/sysctl.d/00-defaults.conf ...
.....
* Applying /etc/sysctl.conf ...
net.ipv4.tcp_syncookies = 0

Check again net.ipv4.tcp_syncookies value
$ sysctl net.ipv4.tcp_syncookies
net.ipv4.tcp_syncookies = 0
#ec2 (1) #aws (9)
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