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|
{
lib,
config,
pkgs,
...
}:
with lib; let
cfg = config.local.net;
in {
options.local.net = with lib.types; {
enable = mkEnableOption "networking stack";
hostname = mkOption {
type = str;
};
dhcpInterface = mkOption {
type = nullOr str;
default = null;
};
};
config = mkIf cfg.enable {
boot.kernel.sysctl = {
# rp_filter=1 reemplazado por nixos-fw-rpfilter
"net.ipv4.conf.all.rp_filter" = mkForce 2;
"net.ipv4.conf.default.rp_filter" = mkForce 2;
"net.ipv4.conf.all.forwarding" = mkForce true;
"net.ipv6.conf.all.forwarding" = mkForce true;
"net.ipv4.conf.default.forwarding" = mkForce true;
"net.ipv6.conf.default.forwarding" = mkForce true;
"net.ipv4.conf.all.accept_redirects" = mkForce false;
"net.ipv6.conf.all.accept_redirects" = mkForce false;
"net.ipv4.conf.default.accept_redirects" = mkForce false;
"net.ipv6.conf.default.accept_redirects" = mkForce false;
};
environment.systemPackages = with pkgs; [
conntrack-tools
dhcpcd
dnsutils
nmap
socat
tcpdump
wireguard-tools
];
networking = {
domain = mkDefault config.local.domains.host.main;
hostName = cfg.hostname;
firewall = {
logReversePathDrops = true;
checkReversePath = "loose";
extraCommands = mkBefore ''
ip46tables -t filter -P INPUT DROP
ip46tables -t filter -P FORWARD ACCEPT #TODO: DROP
ip46tables -t filter -N local-input
ip46tables -t filter -N local-forward
ip46tables -t nat -N local-prerouting
ip46tables -t nat -N local-postrouting
ip46tables -t filter -I INPUT -j local-input
ip46tables -t filter -I FORWARD -j local-forward
ip46tables -t nat -I PREROUTING -j local-prerouting
ip46tables -t nat -I POSTROUTING -j local-postrouting
ip46tables -t filter -A local-forward -m conntrack --ctstate RELATED,ESTABLISHED,SNAT,DNAT -j ACCEPT
'';
extraStopCommands = mkAfter ''
ip46tables -t filter -D INPUT -j local-input || true
ip46tables -t filter -D FORWARD -j local-forward || true
ip46tables -t nat -D PREROUTING -j local-prerouting || true
ip46tables -t nat -D POSTROUTING -j local-postrouting || true
ip46tables -t filter -F local-input || true
ip46tables -t filter -X local-input || true
ip46tables -t filter -F local-forward || true
ip46tables -t filter -X local-forward || true
ip46tables -t nat -F local-prerouting || true
ip46tables -t nat -X local-prerouting || true
ip46tables -t nat -F local-postrouting || true
ip46tables -t nat -X local-postrouting || true
ip46tables -t filter -P INPUT ACCEPT
ip46tables -t filter -P FORWARD ACCEPT
'';
logRefusedConnections = false;
};
useDHCP = false;
enableIPv6 = mkDefault true;
useNetworkd = mkDefault true;
useHostResolvConf = false;
wireguard.enable = true;
};
systemd.network.networks = mkIf (cfg.dhcpInterface != null) {
${cfg.dhcpInterface} = {
matchConfig.Name = cfg.dhcpInterface;
networkConfig = {
DHCP = "ipv4";
IPv6AcceptRA = true;
IPv6PrivacyExtensions = "kernel";
};
# make routing on this interface a dependency for network-online.target
linkConfig.RequiredForOnline = "routable";
};
};
};
}
|
