You think UNIX doesn't have those settings??

Just to name a few

net.ipv4.ip_forward = 1
net.ipv4.conf.all.rp_filter = 0 # 0 for IPSEC
kernel.sysrq = 0
net.ipv4.icmp_echo_ignore_all = 1
net.ipv4.icmp_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.tcp_keepalive_time = 1800
net.ipv4.tcp_window_scaling = 0
net.ipv4.tcp_syncookies = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.all.log_martians = 0
net.ipv4.ip_always_defrag = 1
net.ipv4.tcp_sack = 0
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_fin_timeout = 30
net.ipv4.ip_local_port_range = 32768 61000
vm.bdflush = 100 1200 128 512 15 5000 500 1884 2




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