84 lines
2.7 KiB
Plaintext
84 lines
2.7 KiB
Plaintext
# ==========
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# Anti-DDoS Kernel Settings
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# ==========
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# see:
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# https://javapipe.com/blog/iptables-ddos-protection/
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# These sysctl.conf settings help to maximize the performance of your server
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# under DDoS as well as the effectiveness of the iptables rules that we’re going
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# to provide in this guide.
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kernel.printk = 4 4 1 7
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kernel.panic = 10
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kernel.sysrq = 0
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kernel.shmmax = 4294967296
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#kernel.shmall = 4194304
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kernel.shmall = 134217728
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kernel.core_uses_pid = 1
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kernel.msgmnb = 65536
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kernel.msgmax = 65536
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vm.swappiness = 20
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vm.dirty_ratio = 80
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vm.dirty_background_ratio = 5
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fs.file-max = 2097152
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net.core.netdev_max_backlog = 262144
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net.core.rmem_default = 31457280
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net.core.rmem_max = 67108864
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net.core.wmem_default = 31457280
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net.core.wmem_max = 67108864
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net.core.somaxconn = 65535
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net.core.optmem_max = 25165824
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net.ipv4.neigh.default.gc_thresh1 = 4096
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net.ipv4.neigh.default.gc_thresh2 = 8192
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net.ipv4.neigh.default.gc_thresh3 = 16384
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net.ipv4.neigh.default.gc_interval = 5
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net.ipv4.neigh.default.gc_stale_time = 120
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net.netfilter.nf_conntrack_max = 10000000
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net.netfilter.nf_conntrack_tcp_loose = 0
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net.netfilter.nf_conntrack_tcp_timeout_established = 1800
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net.netfilter.nf_conntrack_tcp_timeout_close = 10
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net.netfilter.nf_conntrack_tcp_timeout_close_wait = 10
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net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 20
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net.netfilter.nf_conntrack_tcp_timeout_last_ack = 20
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net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 20
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net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 20
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net.netfilter.nf_conntrack_tcp_timeout_time_wait = 10
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net.ipv4.tcp_slow_start_after_idle = 0
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net.ipv4.ip_local_port_range = 1024 65000
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net.ipv4.ip_no_pmtu_disc = 1
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net.ipv4.route.flush = 1
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net.ipv4.route.max_size = 8048576
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net.ipv4.icmp_echo_ignore_broadcasts = 1
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net.ipv4.icmp_ignore_bogus_error_responses = 1
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net.ipv4.tcp_congestion_control = htcp
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net.ipv4.tcp_mem = 65536 131072 262144
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net.ipv4.udp_mem = 65536 131072 262144
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net.ipv4.tcp_rmem = 4096 87380 33554432
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net.ipv4.udp_rmem_min = 16384
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net.ipv4.tcp_wmem = 4096 87380 33554432
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net.ipv4.udp_wmem_min = 16384
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net.ipv4.tcp_max_tw_buckets = 1440000
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net.ipv4.tcp_tw_recycle = 0
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net.ipv4.tcp_tw_reuse = 1
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net.ipv4.tcp_max_orphans = 400000
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net.ipv4.tcp_window_scaling = 1
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net.ipv4.tcp_rfc1337 = 1
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net.ipv4.tcp_syncookies = 1
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net.ipv4.tcp_synack_retries = 1
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net.ipv4.tcp_syn_retries = 2
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net.ipv4.tcp_max_syn_backlog = 16384
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net.ipv4.tcp_timestamps = 1
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net.ipv4.tcp_sack = 1
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net.ipv4.tcp_fack = 1
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net.ipv4.tcp_ecn = 2
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net.ipv4.tcp_fin_timeout = 10
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net.ipv4.tcp_keepalive_time = 600
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net.ipv4.tcp_keepalive_intvl = 60
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net.ipv4.tcp_keepalive_probes = 10
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net.ipv4.tcp_no_metrics_save = 1
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net.ipv4.ip_forward = 0
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net.ipv4.conf.all.accept_redirects = 0
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net.ipv4.conf.all.send_redirects = 0
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net.ipv4.conf.all.accept_source_route = 0
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net.ipv4.conf.all.rp_filter = 1
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