#networking

net.ipv4.conf.all.arp_notify = 1
net.ipv6.conf.all.autoconf = 0
net.ipv6.conf.default.autoconf = 0
net.ipv6.conf.eth0.autoconf = 0
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.default.accept_ra = 0
net.ipv6.conf.eth0.accept_ra = 0
net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1

net.ipv4.ip_local_port_range = 40000 65000

#connection limits

net.core.somaxconn = 64000

net.core.netdev_max_backlog = 524288
net.netfilter.nf_conntrack_max = 1048576

net.ipv4.tcp_max_syn_backlog = 48960
net.ipv4.tcp_max_tw_buckets = 1440000
net.ipv4.tcp_max_orphans = 456000


#conntrack values (excluding conn limits)

net.netfilter.nf_conntrack_tcp_timeout_established = 30
net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 10
net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 10
net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 10
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 4
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 4
net.netfilter.nf_conntrack_tcp_timeout_last_ack = 10
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 10
net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 15
net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 10
net.netfilter.nf_conntrack_tcp_timeout_close = 10

net.netfilter.nf_conntrack_udp_timeout = 15
net.netfilter.nf_conntrack_udp_timeout_stream = 15

net.netfilter.nf_conntrack_tcp_loose = 0
#may change above to 1 which would cause it to track less stuff
net.netfilter.nf_conntrack_tcp_max_retrans = 3



#buffers


net.core.rmem_default = 31457280
net.core.rmem_max = 12582912
net.core.wmem_default = 31457280
net.core.wmem_max = 12582912

net.core.optmem_max = 25165824

net.ipv4.tcp_mem = 131072 1048576 1441792
net.ipv4.tcp_rmem = 8192 87380 16777216
net.ipv4.tcp_wmem = 8192 65536 16777216

net.ipv4.udp_mem = 65536 131072 262144
net.ipv4.udp_rmem_min = 16384
net.ipv4.udp_wmem_min = 16384


#timeouts
net.ipv4.tcp_fin_timeout = 10
net.ipv4.tcp_keepalive_time = 300
net.ipv4.tcp_keepalive_probes = 5
net.ipv4.tcp_keepalive_intvl = 10
net.ipv4.tcp_synack_retries = 2



#settings

net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.conf.all.log_martians = 1