Set Kernel Parameters etc/sysctl.conf

net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 2
net.ipv4.conf.default.accept_source_route = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
fs.file-max = 65536
kernel.msgmni = 2878
kernel.msgmax = 8192
kernel.msgmnb = 65536
kernel.sem = 250 32000 100 128
kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.shmmax = 12884901888
kernel.sysrq = 1
net.core.rmem_default = 262144
net.core.rmem_max = 262144
net.core.wmem_default = 262144
net.core.wmem_max = 262144
fs.aio-max-nr = 3145728
net.ipv4.ip_local_port_range = 1024 65000
vm.min_free_kbytes = 51200