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89 lines
2.2 KiB
Nix
89 lines
2.2 KiB
Nix
# This module is necessary for hosts that are serving through Cloudflare.
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{ config, pkgs, lib, ... }:
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let
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cloudflareIpRanges = [
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# Cloudflare IPv4: https://www.cloudflare.com/ips-v4
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"173.245.48.0/20"
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"103.21.244.0/22"
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"103.22.200.0/22"
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"103.31.4.0/22"
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"141.101.64.0/18"
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"108.162.192.0/18"
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"190.93.240.0/20"
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"188.114.96.0/20"
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"197.234.240.0/22"
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"198.41.128.0/17"
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"162.158.0.0/15"
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"104.16.0.0/13"
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"104.24.0.0/14"
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"172.64.0.0/13"
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"131.0.72.0/22"
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# Cloudflare IPv6: https://www.cloudflare.com/ips-v6
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"2400:cb00::/32"
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"2606:4700::/32"
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"2803:f800::/32"
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"2405:b500::/32"
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"2405:8100::/32"
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"2a06:98c0::/29"
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"2c0f:f248::/32"
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];
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in {
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options.cloudflare.enable = lib.mkEnableOption "Use Cloudflare.";
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config = lib.mkIf config.cloudflare.enable {
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# Forces Caddy to error if coming from a non-Cloudflare IP
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caddy.routes = [{
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match = [{ not = [{ remote_ip.ranges = cloudflareIpRanges; }]; }];
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handle = [{
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handler = "static_response";
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status_code = "403";
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}];
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}];
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# Tell Caddy to use Cloudflare DNS for ACME challenge validation
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services.caddy.package = (pkgs.callPackage ../../../overlays/caddy.nix {
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plugins = [ "github.com/caddy-dns/cloudflare" ];
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# vendorSha256 = "sha256-K9HPZnr+hMcK5aEd1H4gEg6PXAaNrNWFvaHYm5m62JY=";
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});
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caddy.tlsPolicies = [{
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issuers = [{
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module = "acme";
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challenges = {
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dns = {
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provider = {
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name = "cloudflare";
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api_token = "{env.CF_API_TOKEN}";
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};
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resolvers = [ "1.1.1.1" ];
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};
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};
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}];
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}];
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systemd.services.caddy.serviceConfig.EnvironmentFile =
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config.secrets.cloudflareApi.dest;
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systemd.services.caddy.serviceConfig.AmbientCapabilities =
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"CAP_NET_BIND_SERVICE";
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# API key must have access to modify Cloudflare DNS records
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secrets.cloudflareApi = {
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source = ../../../private/cloudflare-api.age;
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dest = "${config.secretsDirectory}/cloudflare-api";
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owner = "caddy";
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group = "caddy";
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};
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# Allows Nextcloud to trust Cloudflare IPs
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services.nextcloud.config.trustedProxies = cloudflareIpRanges;
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};
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}
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