阻擋ddos的核心設定

echo 0 > /proc/sys/vm/swappiness
echo 200 > /proc/sys/vm/vfs_cache_pressure
echo 2048 > /proc/sys/vm/min_free_kbytes
echo 256960 > /proc/sys/net/core/rmem_default
echo 256960 > /proc/sys/net/core/rmem_max
echo 256960 > /proc/sys/net/core/wmem_default
echo 256960 > /proc/sys/net/core/wmem_max
echo 30 > /proc/sys/net/ipv4/tcp_fin_timeout
echo 30 > /proc/sys/net/ipv4/tcp_keepalive_intvl
echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
echo 5 > /proc/sys/net/ipv4/tcp_keepalive_probes
echo 1800 > /proc/sys/net/ipv4/tcp_keepalive_time
echo "4096 87380 4194304" > /proc/sys/net/ipv4/tcp_rmem
echo "4096 16384 4194304" > /proc/sys/net/ipv4/tcp_wmem
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