cat << 'EOF' | sudo tee /etc/sysctl.conf > /dev/null
fs.file-max = 6815744

net.ipv4.tcp_no_metrics_save = 1
net.ipv4.tcp_ecn = 0
net.ipv4.tcp_frto = 1
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_rfc1337 = 1
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_adv_win_scale = 1
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_slow_start_after_idle = 0

net.core.rmem_max = 33554432
net.core.wmem_max = 33554432
net.core.rmem_default = 87380
net.core.wmem_default = 87380
net.ipv4.tcp_rmem = 4096 87380 33554432
net.ipv4.tcp_wmem = 4096 87380 33554432
net.ipv4.udp_rmem_min = 16384
net.ipv4.udp_wmem_min = 16384

net.core.somaxconn = 65535
net.ipv4.tcp_max_syn_backlog = 65535
net.ipv4.tcp_syn_retries = 2
net.ipv4.tcp_synack_retries = 2
net.ipv4.tcp_max_tw_buckets = 65536
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1

net.core.netdev_max_backlog = 262144
net.ipv4.tcp_mem = 786432 1048576 1572864
net.core.default_qdisc = fq
net.ipv4.tcp_congestion_control = bbr

net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.all.route_localnet = 0

net.ipv4.ip_forward = 1
net.ipv4.conf.all.forwarding = 1
net.ipv4.conf.default.forwarding = 1
net.ipv6.conf.all.forwarding = 1
net.ipv6.conf.default.forwarding = 1

net.ipv4.tcp_fastopen = 3
EOF

sudo sysctl -p