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I am trying to enable syn cookies in a server, but I can't.
root@server [~]# echo '1' > /proc/sys/net/ipv4/tcp_syncookies
root@server [~]# cat /proc/sys/net/ipv4/tcp_syncookies
What is wrong, and how could I enable syn cookies?
net.ipv4.tcp_syncookies = 0
7 years, 4 months ago