agares: use as router

This commit is contained in:
Tim Schubert 2023-10-14 14:01:06 +02:00 committed by Tim Schubert
parent 572d813eed
commit 21add79ffa
13 changed files with 640 additions and 76 deletions

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@ -1,18 +1,45 @@
{ config
, pkgs
, lib
, modulesPath
, pkgs
, ...
}: {
}:
{
imports = [
(modulesPath + "/installer/scan/not-detected.nix")
./ddns.nix
./dns.nix
./firewall.nix
../modules/profiles/server.nix
./hardware-configuration.nix
./network.nix
./ntp.nix
./ppp.nix
];
# to be able to use qemu from substituter
environment.noXlibs = false;
fileSystems."/" = {
device = "/dev/sda1";
fsType = "btrfs";
options = [ "subvol=root" ];
};
# libvirtd
security.polkit.enable = true;
#fileSystems."/nix/store" = {
# device = "/dev/sda1";
# fsType = "btrfs";
# options = [ "subvol=/root/nix" "noatime" ];
#};
fileSystems."/swap" = {
device = "/dev/sda1";
fsType = "btrfs";
options = [ "subvol=/root/swap" "noatime" ];
};
#swapDevices = [{
# device = "/swap/swapfile";
# size = 32 * 1024; # 32 GByte
#}];
hardware.cpu.amd.updateMicrocode = config.hardware.enableRedistributableFirmware;
dadada = {
admin.enable = true;
@ -23,9 +50,17 @@
networking.hostName = "agares";
networking.domain = "bs.dadada.li";
boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "ehci_pci" "usb_storage" "sd_mod" "sdhci_pci" ];
boot.initrd.kernelModules = [ "dm-snapshot" ];
# Use the GRUB 2 boot loader.
boot.loader.grub.enable = true;
boot.loader.grub.device = "/dev/sda";
boot.loader.grub.extraConfig = "
serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1
terminal_input serial
terminal_output serial
";
boot.kernelParams = [
"console=ttyS0,115200"
@ -41,46 +76,15 @@
"vfio_virqfd"
];
networking.vlans = {
lan = {
id = 11;
interface = "enp1s0";
};
backup = {
id = 13;
interface = "enp1s0";
};
};
networking.bridges = {
"br-lan" = {
interfaces = [ "lan" ];
};
"br-backup" = {
interfaces = [ "backup" ];
};
};
networking.interfaces.enp1s0.useDHCP = true;
networking.firewall = {
enable = true;
allowPing = true;
allowedTCPPorts = [
22 # SSH
];
};
virtualisation.libvirtd.enable = true;
environment.systemPackages = with pkgs; [
curl
flashrom
dmidecode
tcpdump
];
# Running router VM. They have to be restarted in the right order, so network comes up cleanly. Not ideal.
system.autoUpgrade.allowReboot = false;
system.stateVersion = "22.05";
system.stateVersion = "23.05";
}

13
nixos/agares/ddns.nix Normal file
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@ -0,0 +1,13 @@
{ config, ... }:
{
dadada.ddns = {
domains = [ "vpn.dadada.li" ];
credentialsPath = config.age.secrets."ddns-credentials".path;
interface = "wan";
};
age.secrets."ddns-credentials" = {
file = "${config.dadada.secrets.path}/ddns-credentials.age";
mode = "400";
};
}

69
nixos/agares/dns.nix Normal file
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@ -0,0 +1,69 @@
{ ... }:
{
services.unbound = {
enable = true;
localControlSocketPath = "/run/unbound/unbound.ctl";
settings = {
server = {
access-control = [
"127.0.0.0/8 allow"
"127.0.0.1/32 allow_snoop"
"192.168.100.0/24 allow"
"192.168.101.0/24 allow"
"192.168.102.0/24 allow"
"192.168.103.0/24 allow"
"192.168.1.0/24 allow"
"172.16.128.0/24 allow"
"::1/128 allow_snoop"
"fd42:9c3b:f96d::/48 allow"
];
interface = [
"127.0.0.1"
"192.168.1.1"
"192.168.100.1"
"192.168.101.1"
"192.168.102.1"
"::1"
"fd42:9c3b:f96d:100::1"
"fd42:9c3b:f96d:101::1"
"fd42:9c3b:f96d:102::1"
"fd42:9c3b:f96d:103::1"
];
prefer-ip6 = true;
prefetch = true;
prefetch-key = true;
serve-expired = false;
aggressive-nsec = true;
hide-identity = true;
hide-version = true;
use-caps-for-id = true;
val-permissive-mode = true;
local-zone = [
"\"168.192.in-addr.arpa.\" nodefault"
"\"d.f.ip6.arpa.\" nodefault"
];
};
forward-zone = [
{
name = ".";
forward-tls-upstream = "yes";
forward-addr = [
"2620:fe::fe@853#dns.quad9.net"
"2620:fe::9@853#dns.quad9.net"
"9.9.9.9@853#dns.quad9.net"
"149.112.112.112@853#dns.quad9.net"
];
}
];
stub-zone =
let
stubZone = name: addrs: { name = "${name}"; stub-addr = addrs; };
in
[
#(stubZone "li.dadada.bs" ["192.168.128.220" "2a01:4f8:c010:a710::1"])
#(stubZone "d.6.9.f.b.3.c.9.2.4.d.f.ip6.arpa" ["192.168.101.220" "2a01:4f8:c010:a710::1"])
#(stubZone "168.192.in-addr.arpa" ["192.168.128.220" "2a01:4f8:c010:a710::1"])
];
};
};
}

13
nixos/agares/firewall.nix Normal file
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@ -0,0 +1,13 @@
{ ... }:
{
networking = {
useDHCP = false;
nat.enable = false;
firewall.enable = false;
nftables = {
enable = true;
checkRuleset = true;
ruleset = builtins.readFile ./rules.nft;
};
};
}

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@ -1,35 +0,0 @@
# Do not modify this file! It was generated by nixos-generate-config
# and may be overwritten by future invocations. Please make changes
# to /etc/nixos/configuration.nix instead.
{ config
, lib
, pkgs
, modulesPath
, ...
}: {
imports = [
(modulesPath + "/installer/scan/not-detected.nix")
];
boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "ehci_pci" "usb_storage" "sd_mod" "sdhci_pci" ];
boot.initrd.kernelModules = [ ];
boot.extraModulePackages = [ ];
fileSystems."/" = {
device = "/dev/sda1";
fsType = "btrfs";
options = [ "subvol=root" ];
};
swapDevices = [ ];
# The global useDHCP flag is deprecated, therefore explicitly set to false here.
# Per-interface useDHCP will be mandatory in the future, so this generated config
# replicates the default behaviour.
networking.useDHCP = lib.mkDefault false;
networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
networking.interfaces.enp2s0.useDHCP = lib.mkDefault true;
networking.interfaces.enp3s0.useDHCP = lib.mkDefault true;
hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
}

252
nixos/agares/network.nix Normal file
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@ -0,0 +1,252 @@
{ config, lib, ... }:
let
mergeAttrsList = lib.attrsets.mergeAttrsList;
map = builtins.map;
ulaPrefix = "fd42:9c3b:f96d"; # fd42:9c3b:f96d::/48
ipv4Prefix = "192.168"; # 192.168.96.0/19
domain = "bs.dadada.li";
in
{
systemd.network = {
enable = true;
links = {
"10-persistent" = {
matchConfig.OriginalName = [ "enp1s0" "enp2s0" ];
linkConfig.MACAddressPolicy = "persistent";
};
};
netdevs = {
# QoS concentrator
"ifb4ppp0" = {
netdevConfig = {
Kind = "ifb";
Name = "ifb4ppp0";
};
};
"20-lan" = {
netdevConfig = {
Kind = "vlan";
Name = "lan.10";
};
vlanConfig = {
Id = 10;
};
};
"20-freifunk" = {
netdevConfig = {
Kind = "vlan";
Name = "ff.11";
};
vlanConfig = {
Id = 11;
};
};
"20-srv" = {
netdevConfig = {
Kind = "vlan";
Name = "srv.13";
};
vlanConfig = {
Id = 13;
};
};
"20-roadw" = {
netdevConfig = {
Kind = "wireguard";
Name = "roadw";
};
wireguardConfig = {
PrivateKeyFile = config.age.secrets."wg-privkey-vpn-dadada-li".path;
ListenPort = 51234;
};
wireguardPeers = [{
wireguardPeerConfig =
let
peerAddresses = i: [
"${ipv4Prefix}.120.${i}/32"
"${ulaPrefix}:120::${i}/128"
];
in
{
PublicKey = "0eWP1hzkyoXlrjPSOq+6Y1u8tnFH+SejBJs8f8lf+iU=";
AllowedIPs = peerAddresses "3";
};
}];
};
};
networks = let
subnet = name: subnetId: {
matchConfig.Name = name;
addresses = [
{ addressConfig.Address = "${ipv4Prefix}.${subnetId}.1/24"; }
{ addressConfig.Address = "${ulaPrefix}:${subnetId}::1/64"; }
];
dhcpPrefixDelegationConfig = {
SubnetId = "0x${subnetId}";
};
ipv6Prefixes = [
{
ipv6PrefixConfig.Prefix = "${ulaPrefix}:${subnetId}::/64";
}
];
dhcpServerConfig = {
DNS = "${ipv4Prefix}.${subnetId}.1";
NTP = "${ipv4Prefix}.${subnetId}.1";
EmitDNS = true;
EmitNTP = true;
EmitRouter = true;
PoolOffset = 100;
PoolSize = 100;
SendOption = "12:string:${domain}";
};
linkConfig = {
RequiredForOnline = "no";
};
networkConfig = {
Domains = domain;
EmitLLDP = "yes";
IPv6SendRA = true;
IPv6AcceptRA = false;
DHCPPrefixDelegation = true;
DHCPServer = true;
};
extraConfig = ''
[CAKE]
OverheadBytes = 38
Bandwidth = 1G
'';
};
in {
"10-mgmt" = subnet "enp1s0" "100" // {
networkConfig.VLAN = [ "lan.10" "ff.11" "srv.13" ];
dhcpServerStaticLeases = [
{
# legion
dhcpServerStaticLeaseConfig = {
Address = "192.168.100.107";
MACAddress = "80:CC:9C:95:4A:60";
};
}
];
};
"30-lan" = subnet "lan.10" "101" // {
dhcpServerStaticLeases = [
{
# ninurta
dhcpServerStaticLeaseConfig = {
Address = "192.168.101.184";
MACAddress = "48:21:0B:3E:9C:FE";
};
}
{
# crocell
dhcpServerStaticLeaseConfig = {
Address = "192.168.101.122";
MACAddress = "9C:C9:EB:4F:3F:0E";
};
}
{
# gorgon
dhcpServerStaticLeaseConfig = {
Address = "192.168.101.205";
MACAddress = "8C:C6:81:6A:39:2F";
};
}
];
};
"30-ff" = subnet "ff.11" "102";
"30-srv" = subnet "srv.13" "103";
"30-ifb4ppp0" = {
name = "ifb4ppp0";
extraConfig = ''
[CAKE]
OverheadBytes = 65
Bandwidth = 95M
FlowIsolationMode = triple
'';
};
# TODO does not work
"30-ppp0" = {
name = "ppp*";
linkConfig = {
RequiredForOnline = "routable";
};
networkConfig = {
KeepConfiguration = "static";
DefaultRouteOnDevice = true;
LinkLocalAddressing = "ipv6";
DHCP = "ipv6";
};
extraConfig = ''
[CAKE]
OverheadBytes = 65
Bandwidth = 36M
FlowIsolationMode = triple
[DHCPv6]
PrefixDelegationHint= ::/56
UseAddress = false
UseDelegatedPrefix = true
WithoutRA = solicit
[DHCPPrefixDelegation]
UplinkInterface=:self
'';
ipv6SendRAConfig = {
# Let networkd know that we would very much like to use DHCPv6
# to obtain the "managed" information. Not sure why they can't
# just take that from the upstream RAs.
Managed = true;
};
};
# Talk to modem for management
"enp2s0" = {
name = "enp2s0";
linkConfig = {
RequiredForOnline = "no";
};
networkConfig = {
Address = "192.168.1.254/24";
EmitLLDP = "yes";
};
};
"10-roadw" = {
matchConfig.Name = "roadw";
address = [
"${ipv4Prefix}.120.1/32"
"${ulaPrefix}:120::1/128"
];
DHCP = "no";
networkConfig.IPv6AcceptRA = false;
linkConfig.RequiredForOnline = "no";
routes = [
{
routeConfig = { Destination = "${ipv4Prefix}.120.1/24"; };
}
{
routeConfig = { Destination = "${ulaPrefix}::120:1/64"; };
}
];
};
};
};
age.secrets."wg-privkey-vpn-dadada-li" = {
file = "${config.dadada.secrets.path}/wg-privkey-vpn-dadada-li.age";
owner = "systemd-network";
};
boot.kernel.sysctl = {
# Enable forwarding for interface
"net.ipv4.conf.all.forwarding" = "1";
"net.ipv6.conf.all.forwarding" = "1";
"net.ipv6.conf.all.accept_ra" = "0";
"net.ipv6.conf.all.autoconf" = "0";
# Set via systemd-networkd
#"net.ipv6.conf.${intf}.use_tempaddr" = "0";
};
powerManagement.cpuFreqGovernor = lib.mkDefault "schedutil";
}

12
nixos/agares/ntp.nix Normal file
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{ ... }:
{
services.chrony = {
enable = true;
extraConfig = ''
allow 192.168.1
allow 192.168.100
allow 192.168.101
allow 192.168.102
'';
};
}

63
nixos/agares/ppp.nix Normal file
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@ -0,0 +1,63 @@
{ pkgs, lib, config, ... }:
let
secretsPath = config.dadada.secrets.path;
in
{
# PPPoE
services.pppd = {
enable = true;
peers = {
telekom = {
enable = true;
autostart = true;
config = ''
debug
plugin pppoe.so enp2s0
noauth
hide-password
call telekom-secret
linkname ppp0
persist
maxfail 0
holdoff 5
noipdefault
defaultroute
lcp-echo-interval 15
lcp-echo-failure 3
'';
};
};
};
age.secrets."etc-ppp-telekom-secret" = {
file = "${secretsPath}/etc-ppp-telekom-secret.age";
owner = "root";
mode = "700";
path = "/etc/ppp/peers/telekom-secret";
};
age.secrets."etc-ppp-pap-secrets" = {
# format: client server passphrase
file = "${secretsPath}/etc-ppp-chap-secrets.age";
owner = "root";
mode = "700";
path = "/etc/ppp/pap-secrets";
};
# Hook for QoS via Intermediate Functional Block
environment.etc."ppp/ip-up" = {
mode = "755";
text = with lib; ''
#!/usr/bin/env sh
${getBin pkgs.iproute2}/bin/tc qdisc del dev $1 ingress
${getBin pkgs.iproute2}/bin/tc qdisc add dev $1 handle ffff: ingress
${getBin pkgs.iproute2}/bin/tc filter add dev $1 parent ffff: matchall action mirred egress redirect dev ifb4ppp0
'';
};
}

140
nixos/agares/rules.nft Normal file
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flush ruleset
define IF_MGMT = "enp1s0"
define IF_FF = "ff.11"
define IF_LAN = "lan.10"
define IF_WAN = "ppp0"
define IF_SRV = "srv.13"
# Modem uses this for internet uplink via our WAN
define IF_MODEM = "enp2s0"
define IF_ROADW = "roadwarrior"
table inet filter {
# Will give "no such file or directory if hardware does not support flow offloading"
# flowtable f {
# hook ingress priority 0; devices = { enp1s0, enp2s0 }; flags offload;
# }
chain input_local {
ip6 saddr != ::1/128 log prefix "Dropped IPv6 nonlocalhost packet on loopback:" drop
accept comment "Accept traffic to loopback interface"
}
chain input_icmp_untrusted {
# Allow ICMP echo
ip protocol icmp icmp type { echo-request } limit rate 1000/second burst 5 packets accept comment "Accept echo request"
# Allow some ICMPv6
icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, echo-request, echo-reply, parameter-problem, mld-listener-query, mld-listener-report, mld-listener-done, mld-listener-reduction, nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, mld2-listener-report } limit rate 1000/second burst 5 packets accept comment "Allow some ICMPv6"
}
chain input_modem {
jump input_icmp_untrusted
}
chain input_wan {
# DHCPv6 client
meta nfproto ipv6 udp sport 547 accept comment "Allow DHCPv6 client"
jump input_icmp_untrusted
udp dport 51234 accept comment "Wireguard roadwarriors"
}
chain input_lan {
counter accept comment "Accept all traffic from LAN"
}
chain input_mgmt {
counter accept comment "Accept all traffic from MGMT"
}
chain input_srv {
counter accept comment "Accept all traffic from services"
}
chain input_roadw {
counter accept comment "Accept all traffic from roadwarriors"
}
chain input_ff {
jump input_icmp_untrusted
# DHCP
meta nfproto ipv6 udp dport 547 accept comment "Allow DHCPv6 client"
# Allow DNS and DHCP from Freifunk
udp dport { 53, 67 } accept comment "Allow DNS and DHCP from Freifunk"
}
chain input {
type filter hook input priority filter; policy drop;
ct state {established, related} counter accept comment "Accept packets from established and related connections"
ct state invalid counter drop comment "Early drop of invalid packets"
iifname vmap { lo : accept, $IF_WAN : jump input_wan, $IF_LAN : jump input_lan, $IF_FF : jump input_ff, $IF_ROADW : jump input_roadw, $IF_MODEM : jump input_modem, $IF_MGMT : jump input_mgmt }
}
# Only works if hardware flow offloading is available
# chain offload {
# type filter hook forward priority -100; policy accept;
# ip protocol tcp flow add @f
# counter packets 0 bytes 0
# }
chain forward {
type filter hook forward priority filter; policy drop;
# Accept connections tracked by destination NAT
ct status dnat counter accept comment "Accept connections tracked by DNAT"
# TCP options
tcp flags syn tcp option maxseg size set rt mtu comment "Remove TCP maximum segment size and set a size based on route information"
# ICMPv6
icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, echo-request, echo-reply, parameter-problem } limit rate 5/second counter accept comment "Forward up to five ICMP messages of allowed types per second"
meta l4proto ipv6-icmp accept comment "Forward ICMP in IPv6"
# mgmt <-> *
iifname { $IF_LAN, $IF_ROADW } oifname $IF_MGMT counter reject comment "Reject traffic from LAN and roadwarrior to MGMT"
iifname $IF_MGMT oifname { $IF_LAN, $IF_ROADW } counter reject comment "Reject traffic from MGMT to LAN and roadwarrior"
# drop (instead of reject) everything else to MGMT
# LAN, ROADW -> * (except mgmt)
iifname { $IF_LAN, $IF_ROADW } counter accept comment "Allow all traffic forwarding from LAN and roadwarrior to all interfaces, except to mgmt"
# FF -> WAN
iifname $IF_FF oifname $IF_WAN counter accept comment "Allow all traffic forwarding from Freifunk to WAN"
# { WAN, SRV } -> { FF, LAN, RW, SRV }
iifname { $IF_WAN, $IF_SRV } oifname { $IF_FF, $IF_LAN, $IF_ROADW, $IF_SRV } ct state established,related counter accept comment "Allow established back from WAN and SRV"
# WAN -> SRV
iifname $IF_WAN oifname $IF_SRV tcp dport ssh accept comment "Allow all SSH traffic forwarding from WAN to services"
}
chain output {
type filter hook output priority 100; policy accept;
}
}
table ip nat {
chain prerouting {
type nat hook prerouting priority dstnat; policy accept;
}
chain postrouting {
type nat hook postrouting priority srcnat; policy accept;
ip saddr { 192.168.96.0/19 } oifname { $IF_WAN } masquerade comment "Masquerade traffic from LANs"
}
}
table arp filter {
chain input {
type filter hook input priority filter; policy drop;
iifname { $IF_MGMT, $IF_LAN, $IF_FF, $IF_MODEM } limit rate 1/second burst 2 packets accept comment "Limit number of ARP messages from LAN, FF, MGMT, modem"
}
}

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@ -0,0 +1,11 @@
age-encryption.org/v1
-> ssh-ed25519 L7f05w xkw7tPnkvX1TGG2/Urocw8mQe6r2/Fpxkvs1Nr3cVXs
eJyvIUrFp0mGWXcmHjP1+5YW9cgs9m8bqUnwgm8iMi0
-> ssh-ed25519 Otklkw 1IfE9jxV6gz7yfPmSmXsTWsB36RFHmdpjw5eUlElTCo
GyTNhYhDbD2olE6DiKkr47Mu9NMBMHsO5/pTkcx8WXk
-> ~6#g&f-grease
lIbAZllBnOK9YRMIQfPX/veMc111/u5w83pQGuMMWUSyaHT0xwxp8IYn+R9m9iV0
haQXgTSuQxPhGUJg+1wwncJwnYgzDcCPruprrFTmf0s5HZDr
--- n9uSP8ZmTTZ89mlRiNKtRfAEz7NV7Yn0ZQhzP4uh4fo
#Ôü¿¯K²¥Ý~l¨Y_!Ï1!fz€î@
O¦FИ(öÃZ«!<21>Ȣʟ8aBÒ^¢ç!CFP•»[h$òOaf‡ÕÂýe<C3BD>(l:X®â*póÚÅÂ

View file

@ -0,0 +1,9 @@
age-encryption.org/v1
-> ssh-ed25519 L7f05w HrgIGi6lUHRxv9JkCfrZaEHYlB0uBOhwVrE7FA7fWR0
YJEklSLR9XWt9Z3Vwjgc9hR7JgcYr7l1lxCCU4TJeOw
-> ssh-ed25519 Otklkw ght72AYlMNBSIdVFjgEmmtNvn0fAfmJSJv6ipacc8XQ
M8qx5eXPdKQo+S1iBGuH3UtOCZxKNpgkMVd5hYaC4/k
-> W)K(iXJ-grease B=`{E
52GLQ+oAwz2AphOjy9U5s9m4rn+YLqauNMvZHQy0l4aEijJr/xdkrgizKs7QpA
--- WG1fXgkKmTl1uge3LGCQFa40X1noXQcMDr21hlhfAu8
OmUÁ¥ ªísG m ;<>jIü‡pÊ㘦x[Ån—Ý•™л!<21>n— W´nšž=„0Z¿ÝÆœ½«<C2BD>I£Úw-Ïò 46

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@ -23,7 +23,10 @@ in
"paperless.age".publicKeys = [ systems.gorgon dadada ];
"surgat-ssh_host_ed25519_key.age".publicKeys = [ systems.surgat dadada ];
"ninurta-initrd-ssh-key.age".publicKeys = [ systems.ninurta dadada ];
"ddns-credentials.age".publicKeys = [ systems.ninurta dadada ];
"ddns-credentials.age".publicKeys = [ systems.agares systems.ninurta dadada ];
"etc-ppp-chap-secrets.age".publicKeys = [ systems.agares dadada ];
"etc-ppp-telekom-secret.age".publicKeys = [ systems.agares dadada ];
"wg-privkey-vpn-dadada-li.age".publicKeys = [ systems.agares dadada ];
} //
backupSecrets "ninurta" //
backupSecrets "gorgon" //

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@ -0,0 +1,10 @@
age-encryption.org/v1
-> ssh-ed25519 L7f05w 626jkdszE7nFjXsB8InmF9c7z0g6Lx45rXviJJVipgk
HOo5D8bIXEUWN+OQOrAtsheqEFpoTEljiQN9iLsGYFw
-> ssh-ed25519 Otklkw MoBeg8zEAs7S8yRN4kMWFmh1wpFG9a3sIl7B3933U0I
KHbNqlQgIfC4oOaXnCHuiXxlmqjwrnR72IdTd18yCVQ
-> ~\AYPd-grease +[i?zA&
k2qPi9GkmpHdaMnPqWsMPWdqa00MdrneQSDEixtbPmedrzPD1w
--- R5nczLpf0MEbOrJBfTOM2mHkh3zbWxZRAn6Ke4PsHSg
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