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|
{
config,
inputs,
lib,
pkgs,
...
}:
with lib; let
cfg = config.nixfiles.modules.shadowsocks;
in {
options.nixfiles.modules.shadowsocks = {
enable = mkEnableOption "Shadowsocks";
port = mkOption {
type = with types; port;
default = 8388;
description = "Port.";
};
};
config = mkIf cfg.enable {
secrets.shadowsocks-password.file = "${inputs.self}/secrets/shadowsocks-password";
services = {
shadowsocks = {
enable = true;
passwordFile = config.secrets.shadowsocks-password.path;
localAddress = ["0.0.0.0"];
mode = "tcp_only";
};
fail2ban.jails.shadowsocks-libev = {
enabled = true;
settings = {
filter = "shadowsocks-libev";
inherit (cfg) port;
};
};
};
systemd.services.shadowsocks-libev.path = with pkgs;
mkForce [
(writeShellApplication {
name = "ss-server";
runtimeInputs = [shadowsocks-libev];
text = let
# https://github.com/shadowsocks/shadowsocks-libev/blob/master/acl/server_block_local.acl
aclFile = writeText "outbound_block_list.acl" ''
[outbound_block_list]
0.0.0.0/8
10.0.0.0/8
100.64.0.0/10
127.0.0.0/8
169.254.0.0/16
172.16.0.0/12
192.0.0.0/24
192.0.2.0/24
192.88.99.0/24
192.168.0.0/16
198.18.0.0/15
198.51.100.0/24
203.0.113.0/24
224.0.0.0/4
240.0.0.0/4
255.255.255.255/32
::1/128
::ffff:127.0.0.1/104
fc00::/7
fe80::/10
'';
in ''
ss-server --acl ${aclFile} "$@"
'';
})
coreutils-full
jq
];
environment.etc = mkIf config.nixfiles.modules.fail2ban.enable {
"fail2ban/filter.d/shadowsocks-libev.conf".text = ''
[Definition]
failregex = ^.*failed to handshake with <ADDR>: authentication error$
ignoreregex =
journalmatch = _SYSTEMD_UNIT=shadowsocks-libev.service
'';
};
networking.firewall = {
allowedTCPPorts = [cfg.port];
extraCommands = ''
iptables -A nixos-fw -p tcp --syn --dport ${
toString cfg.port
} -m connlimit --connlimit-above 32 -j nixos-fw-refuse
'';
};
boot.kernel.sysctl = {
"net.core.rmem_max" = mkOverride 100 (pow 2 26);
"net.core.wmem_max" = mkOverride 100 (pow 2 26);
"net.core.netdev_max_backlog" = pow 2 18;
"net.core.somaxconn" = pow 2 12;
"net.ipv4.tcp_syncookies" = 1;
"net.ipv4.tcp_tw_reuse" = mkOverride 100 1;
"net.ipv4.tcp_tw_recycle" = mkOverride 100 0;
"net.ipv4.tcp_fin_timeout" = mkOverride 100 30;
"net.ipv4.tcp_keepalive_time" = 60 * 20;
"net.ipv4.ip_local_port_range" = "10000 65000";
"net.ipv4.tcp_max_syn_backlog" = pow 2 13;
"net.ipv4.tcp_max_tw_buckets" = pow 2 12;
"net.ipv4.tcp_fastopen" = mkOverride 100 3;
"net.ipv4.tcp_mem" = mkOverride 100 (mkTcpMem 15 16 17);
"net.ipv4.tcp_rmem" = mkOverride 100 (mkTcpMem 12 16 26);
"net.ipv4.tcp_wmem" = mkOverride 100 (mkTcpMem 12 16 26);
"net.ipv4.tcp_mtu_probing" = 1;
"net.ipv4.tcp_congestion_control" = "hybla";
};
};
}
|
