362 lines
8.7 KiB
Nix
362 lines
8.7 KiB
Nix
{
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flake,
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inputs,
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lib,
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# outputs,
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# config,
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# pkgs,
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...
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}: let
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# NOTE: I could turn this into a cool NixOS module?
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# TODO: review https://francis.begyn.be/blog/nixos-home-router
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ip = "192.168.0.1";
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cidr = "${ip}/16";
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netmask = "255.255.0.0";
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lease = {
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min = "192.168.0.5";
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max = "192.168.0.250";
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};
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wan_if = "wan0";
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lan_if = "lan0";
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hosts = {
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dragon = {
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identifier = "dragon";
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host = "dragon";
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ip = "192.168.0.10";
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};
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beefcake = {
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identifier = "beefcake";
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host = "beefcake";
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ip = "192.168.0.9";
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};
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};
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in {
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networking.hostName = "router";
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networking.domain = "h.lyte.dev";
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networking.useDHCP = false;
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imports = [
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inputs.disko.nixosModules.disko
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flake.diskoConfigurations.unencrypted
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];
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# TODO: perform a hardware scan
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boot = {
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loader = {
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efi.canTouchEfiVariables = true;
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systemd-boot.enable = true;
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};
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kernel = {
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sysctl = {
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"net.ipv4.conf.all.forwarding" = true;
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"net.ipv6.conf.all.forwarding" = true;
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"net.ipv6.conf.all.accept_ra" = 0;
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"net.ipv6.conf.all.autoconf" = 0;
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"net.ipv6.conf.all.use_tempaddr" = 0;
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"net.ipv6.conf.wan0.accept_ra" = 2;
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# "net.ipv6.conf.wan0.autoconf" = 1;
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};
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};
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};
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powerManagement.cpuFreqGovernor = lib.mkDefault "ondemand";
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services.fail2ban.enable = true;
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services.radvd = {
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enable = true;
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# NOTE: this config is just the default arch linux config I think and may
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# need tweaking? this is what I had on the arch linux router, though :shrug:
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config = ''
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interface lo
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{
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AdvSendAdvert on;
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MinRtrAdvInterval 3;
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MaxRtrAdvInterval 10;
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AdvDefaultPreference low;
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AdvHomeAgentFlag off;
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prefix 2001:db8:1:0::/64
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{
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AdvOnLink on;
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AdvAutonomous on;
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AdvRouterAddr off;
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};
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prefix 0:0:0:1234::/64
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{
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AdvOnLink on;
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AdvAutonomous on;
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AdvRouterAddr off;
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Base6to4Interface ppp0;
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AdvPreferredLifetime 120;
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AdvValidLifetime 300;
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};
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route 2001:db0:fff::/48
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{
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AdvRoutePreference high;
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AdvRouteLifetime 3600;
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};
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RDNSS 2001:db8::1 2001:db8::2
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{
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AdvRDNSSLifetime 30;
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};
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DNSSL branch.example.com example.com
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{
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AdvDNSSLLifetime 30;
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};
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};
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'';
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};
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services.resolved = {
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enable = true;
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extraConfig = ''
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[Resolve]
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DNSStubListener=no
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'';
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};
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services.dnsmasq = {
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enable = true;
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settings = {
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# server endpoints
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listen-address = "::1,127.0.0.1,${ip}";
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port = "53";
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# DNS cache entries
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cache-size = "10000";
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# local domain entries
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local = "/lan/";
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domain = "lan";
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expand-hosts = true;
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dhcp-authoritative = true;
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conf-file = "/usr/share/dnsmasq/trust-anchors.conf";
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dnssec = true;
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except-interface = "${wan_if}";
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interface = "${lan_if}";
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enable-ra = true;
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# dhcp-option = "121,${cidr},${ip}";
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dhcp-range = [
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"lan,${lease.min},${lease.max},${netmask},10m"
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"tag:${lan_if},::1,constructor:${lan_if},ra-names,12h"
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];
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dhcp-host = [
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"${hosts.dragon.host},${hosts.dragon.ip},12h"
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"${hosts.beefcake.host},${hosts.beefcake.ip},12h"
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];
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# may need to go in /etc/hosts (networking.extraHosts), too?
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address = [
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"/video.lyte.dev/192.168.0.9"
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"/git.lyte.dev/192.168.0.9"
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"/bw.lyte.dev/192.168.0.9"
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"/files.lyte.dev/192.168.0.9"
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"/vpn.h.lyte.dev/192.168.0.9"
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"/.h.lyte.dev/192.168.0.9"
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];
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server = [
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"${ip}"
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"8.8.8.8"
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"8.8.4.4"
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"1.1.1.1"
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"1.0.0.1"
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];
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};
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};
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networking.extraHosts = ''
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127.0.0.1 localhost
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127.0.1.1 router.h.lyte.dev router
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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'';
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networking.nat.enable = true; # TODO: maybe replace some of the nftables stuff with this?
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networking.firewall.enable = false;
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networking.nftables = {
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enable = true;
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flushRuleset = true;
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tables = {
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filter = {
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family = "inet";
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content = ''
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chain input {
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# type filter hook input priority filter; policy accept;
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type filter hook input priority 0;
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# anything from loopback interface
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iifname "lo" accept
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# accept traffic we originated
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ct state { established, related } counter accept
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ct state invalid counter drop
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# ICMP
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ip6 nexthdr icmpv6 icmpv6 type { echo-request, nd-neighbor-solicit, nd-neighbor-advert, nd-router-solicit, nd-router-advert, mld-listener-query, destination-unreachable, packet-too-big, time-exceeded, parameter-problem } counter accept
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ip protocol icmp icmp type { echo-request, destination-unreachable, router-advertisement, time-exceeded, parameter-problem } counter accept
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ip protocol icmpv6 counter accept
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ip protocol icmp counter accept
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meta l4proto ipv6-icmp counter accept
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udp dport dhcpv6-client counter accept
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tcp dport { 64022, 22, 53, 67, 25565 } counter accept
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udp dport { 64020, 22, 53, 67 } counter accept
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# iifname "iot" ip saddr $iot-ip tcp dport { llmnr } counter accept
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# iifname "iot" ip saddr $iot-ip udp dport { mdns, llmnr } counter accept
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iifname "${lan_if}" tcp dport { llmnr } counter accept
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iifname "${lan_if}" udp dport { mdns, llmnr } counter accept
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counter drop
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}
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# allow all outgoing
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chain output {
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type filter hook output priority 0;
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accept
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}
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chain forward {
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type filter hook forward priority 0;
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accept
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}
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'';
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};
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nat = {
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family = "ip";
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content = ''
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set masq_saddr {
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type ipv4_addr
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flags interval
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elements = { ${cidr} }
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}
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map map_port_ipport {
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type inet_proto . inet_service : ipv4_addr . inet_service
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}
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chain prerouting {
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iifname ${lan_if} accept
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type nat hook prerouting priority dstnat + 1; policy accept;
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fib daddr type local dnat ip addr . port to meta l4proto . th dport map @map_port_ipport
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iifname ${wan_if} tcp dport { 22, 80, 443, 25565, 64022 } dnat to ${hosts.beefcake.ip}
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iifname ${wan_if} udp dport { 64020 } dnat to ${hosts.beefcake.ip}
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# iifname ${wan_if} tcp dport { 25565 } dnat to 192.168.0.244
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# iifname ${wan_if} udp dport { 25565 } dnat to 192.168.0.244
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# router
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iifname ${wan_if} tcp dport { 2201 } dnat to ${ip}
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}
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chain output {
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type nat hook output priority -99; policy accept;
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ip daddr != 127.0.0.0/8 oif "lo" dnat ip addr . port to meta l4proto . th dport map @map_port_ipport
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}
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chain postrouting {
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type nat hook postrouting priority srcnat + 1; policy accept;
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oifname ${lan_if} masquerade
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ip saddr @masq_saddr masquerade
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}
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'';
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};
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};
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};
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networking.dhcpcd = {
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enable = true;
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extraConfig = ''
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duid
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# No way.... https://github.com/NetworkConfiguration/dhcpcd/issues/36#issuecomment-954777644
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# issues caused by guests with oneplus devices
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noarp
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persistent
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vendorclassid
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option domain_name_servers, domain_name, domain_search
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option classless_static_routes
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option interface_mtu
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option host_name
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#option ntp_servers
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require dhcp_server_identifier
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slaac private
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noipv4ll
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noipv6rs
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static domain_name_servers=${ip}
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interface ${wan_if}
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gateway
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ipv6rs
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iaid 1
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# option rapid_commit
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# ia_na 1
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ia_pd 1 ${lan_if}
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interface ${lan_if}
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static ip_address=${cidr}
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static routers=${ip}
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static domain_name_servers=${ip}
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'';
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};
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systemd.network = {
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enable = true;
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links = {
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"${wan_if}" = {
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enable = true;
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matchConfig = {
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MACAddress = "00:01:2e:82:73:59";
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};
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linkConfig = {
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Name = wan_if;
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};
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};
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"${lan_if}" = {
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enable = true;
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matchConfig = {
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MACAddress = "00:01:2e:82:73:5a";
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};
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linkConfig = {
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Name = lan_if;
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};
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};
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};
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};
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services.avahi = {
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enable = true;
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reflector = true;
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allowInterfaces = [
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lan_if
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];
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};
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system.stateVersion = "23.11";
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}
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