# Increase the maximum amount of option memory buffers

net.core.optmem_max = 65536

# Increase the tcp-time-wait buckets pool size to prevent simple DOS attacks

net.ipv4.tcp_max_tw_buckets = 1440000

net.ipv4.tcp_tw_recycle = 1

net.ipv4.tcp_tw_reuse = 1

# Limit number of orphans, each orphan can eat up to 16M (max wmem) of unswappable memory

net.ipv4.tcp_max_orphans = 16384

net.ipv4.tcp_orphan_retries = 0

# Increase the maximum memory used to reassemble IP fragments

net.ipv4.ipfrag_low_thresh = 446464

# Increase TCP queue length

net.ipv4.neigh.default.proxy_qlen = 96

net.ipv4.neigh.default.unres_qlen = 6

net.core.rmem_default = 16777216

net.core.wmem_default = 16777216

net.core.rmem_max = 16777216

net.core.wmem_max = 16777216

# TCP Autotuning setting: how the TCP stack should behave when it comes to memory usage

net.ipv4.tcp_mem=8388608 8388608 8388608

# TCP Autotuning setting:  receive buffer

#net.ipv4.tcp_rmem=4096 87380 8388608

net.ipv4.tcp_rmem=1048576 4194304 16777216

# TCP Autotuning setting: how much TCP sendbuffer memory space each TCP socket has to use

#net.ipv4.tcp_wmem=4096 65536 8388608

net.ipv4.tcp_wmem=1048576 4194304 16777216

# Disable Log Spoofed Packets, Source Routed Packets, Redirect Packets

net.ipv4.conf.all.log_martians = 0

net.ipv4.conf.default.log_martians = 0

# Decrease the time default value for tcp_fin_timeout connection

net.ipv4.tcp_fin_timeout = 15

# Decrease the time default value for connections to keep alive

net.ipv4.tcp_keepalive_time = 300

net.ipv4.tcp_keepalive_probes = 5

net.ipv4.tcp_keepalive_intvl = 15