linux sysctl

net.ipv4.tcp_allowed_congestion_control = yeah htcp reno bic cdg cubic dctcp westwood highspeed hybla vegas veno scalable lp illinois
net.ipv4.tcp_congestion_control = yeah

net.ipv4.tcp_autocorking = 1
net.ipv4.tcp_low_latency = 1
net.ipv4.tcp_rfc1337 = 0
net.ipv4.tcp_slow_start_after_idle = 1

net.ipv4.tcp_dsack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_sack = 1

net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_workaround_signed_windows = 1

net.ipv4.tcp_fastopen = 1
net.ipv4.tcp_fastopen_key = 00000000-00000000-00000000-00000000

net.ipv4.tcp_ecn = 1
net.ipv4.tcp_ecn_fallback = 1

net.ipv4.tcp_frto = 0

net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1

net.ipv4.tcp_fwmark_accept = 1

net.core.default_qdisc = fq_codel

net.core.bpf_jit_enable = 1

net.core.rmem_default = 2129920
net.core.rmem_max = 4259840

net.core.wmem_default = 2129920
net.core.wmem_max = 4259840

net.ipv4.tcp_rmem = 8192 262144 8388608
net.ipv4.tcp_wmem = 8192 262144 8388608

net.ipv4.udp_rmem_min = 8192
net.ipv4.udp_wmem_min = 8192

net.core.somaxconn = 4096

net.ipv4.fwmark_reflect = 1
net.ipv6.fwmark_reflect = 1

net.ipv4.ip_dynaddr = 1
net.ipv4.ip_forward = 1
net.ipv4.ip_forward_use_pmtu = 0

net.ipv4.ip_local_port_range = 1024 65531
net.ipv4.ip_local_reserved_ports = 1194

# net.netfilter.nf_conntrack_tcp_timeout_established = 432000
# 1 d + 5 m
net.netfilter.nf_conntrack_tcp_timeout_established = 86700

# net.ipv4.tcp_keepalive_time = 7200
# 2 h + 5 m
net.ipv4.tcp_keepalive_time = 7500