make CLI configurable

2024-07-26 12:16:23 +02:00 · 2024-07-26 12:16:23 +02:00 · c7989fa736
commit c7989fa736
parent c3220327e1
15 changed files with 468 additions and 251 deletions
--- a/14
+++ b/14
@ -4,24 +4,20 @@ WORKDIR /app
 COPY . .

 RUN go mod download
-RUN go build -o /app/local-ip
+RUN go build

 FROM gcr.io/distroless/base-debian12:latest

 WORKDIR /local-ip

-COPY --from=build /app/local-ip /local-ip/local-ip
+COPY --from=build /app/local-ip.sh /local-ip/local-ip.sh
 COPY --from=build /app/http/static /local-ip/http/static

 VOLUME /local-ip/.lego

-# DNS
-EXPOSE 53/udp
-# HTTP
-EXPOSE 80/tcp
-# HTTPS
-EXPOSE 443/tcp
+#      DNS    HTTP   HTTPS
+EXPOSE 53/udp 80/tcp 443/tcp

 USER root

-CMD ["/local-ip/local-ip"]
+CMD ["/local-ip/local-ip.sh"]
--- a/README.md
+++ b/README.md
@ -3,48 +3,51 @@
 [local-ip.sh](https://local-ip.sh) is a magic domain name that provides wildcard DNS for any IP address.
 It is heavily inspired by [local-ip.co](http://local-ip.co), [sslip.io](https://sslip.io), and [xip.io](https://xip.io)

-## Usage
-
-```sh
-go run ./main.go # binds to :53 by default but you can override it by using the `-port` parameter
-
-dig @localhost 10-0-1-29.my.local-ip.sh +short
-# 10.0.1.29
-dig @localhost app.10-0-1-29.my.local-ip.sh +short
-# 10.0.1.29
-dig @localhost foo.bar.10.0.1.29.my.local-ip.sh +short
-# 10.0.1.29
-dig @localhost 127.0.0.1.my.local-ip.sh +short
-# 127.0.0.1
-```
-
 ## How it works

 local-ip.sh packs up:
 - an authoritative DNS server that answers queries for the zone `local-ip.sh`
 - a Let's Encrypt client that takes care of obtaining and renewing the wildcard certificate for `*.local-ip.sh` and the root certificate for `local-ip.sh` using the [DNS-01 challenge](https://letsencrypt.org/docs/challenge-types/#dns-01-challenge)
- - an HTTP server that serves static files, including the certificate files
+ - an HTTP server that serves the website and the wildcard certificate files

 It answers queries with the IPv4 address it may find in the subdomain by pattern matching the FQDN.
-It registers an account to Let's Encrypt's ACME server to obtain the wildcard certificate on the first run and then renew
-it about a month before it expires. The account file and the associated key used to request a certificate under the `./.lego/accounts`
-directory and the certificate's files are stored in `./.lego/certs`.
+It registers an account to Let's Encrypt's ACME server to obtain the wildcard certificate on the first run and then renew it about a month before it expires. The account file and the associated key used to request a certificate under the `./.lego/accounts` directory and the certificate's files are stored in `./.lego/certs`.
+It also obtains a separate certificate for the root domain to serve the website through HTTPS. It initially serves the website through HTTP and when the root domain certificate is ready, it redirects all HTTP requests to HTTPS.

-The certificate files are served by an HTTP server on the arbitrary port `:9229` that is intentionally not exposed to
-the internet. [The website](https://local-ip.sh) is connected to the same private network as the service and serves
-as a proxy to access the files securely.
+## Usage
+
+```sh
+go run ./main.go --staging --dns-port 9053 --http-port 9080 --https-port 9443 --domain local-ip.sh --email admin@fake.sh --nameservers 137.66.40.11,137.66.40.12
+
+dig @localhost -p 9053 10-0-1-29.local-ip.sh +short
+# 10.0.1.29
+dig @localhost -p 9053 app.10-0-1-29.local-ip.sh +short
+# 10.0.1.29
+dig @localhost -p 9053 foo.bar.10.0.1.29.local-ip.sh +short
+# 10.0.1.29
+dig @localhost -p 9053 127.0.0.1.local-ip.sh +short
+# 127.0.0.1
+```
+
+### Configuration
+
+local-ip.sh can be configured through environment variables or CLI flags
+
+- `XIP_DNS_PORT` or `--dns-port` optional, port for the DNS server, defaults to `53`.
+- `XIP_HTTP_PORT` or `--http-port` optional, port for the HTTP server, defaults to `80`.
+- `XIP_HTTPS_PORT` or `--https-port` optional, port for the HTTPS server, defaults to `443`.
+- `XIP_STAGING` or `--staging` optional, enable to use Let's Encrypt staging environment to obtain certificates, defaults to `false`.
+- `XIP_DOMAIN` or `--domain` required, domain name of the server hosting this. It will be used as the zone to answer dns queries for.
+- `XIP_EMAIL` or `--email` required, administrator's email address, used to create the ACME account to request certificates from Let's Encrypt and as the `RNAME` value of the SOA record representing the domain administrator's email address.
+- `XIP_NAMESERVERS` or `--nameservers` required, comma-separated IPv4 addresses used to answer `A` queries for `nsX.{domain}` where `X` is the index of the address in this list. For example setting `--domain example.com --nameservers 1.2.3.4,9.8.7.6` will answer `1.2.3.4` for `ns1.example.com` and `9.8.7.6` for `ns2.example.com`. All `nsX.{domain}` nameservers will be in the answer for NS queries to the zone.
+
+A [reference docker compose file](./compose.yml) is available for deployments using Docker.

 ## Self-hosting

-I'm currently hosting [local-ip.sh](https://local-ip.sh) at [Fly.io](https://fly.io) but you can host the service yourself
-if you're into that kind of thing. Note that you will need to edit your domain's glue records so make sure your registrar allows it.
+I'm currently hosting [local-ip.sh](https://local-ip.sh) at [Fly.io](https://fly.io) but you can host the service yourself if you're into that kind of thing. Note that you will need to edit your domain's glue records so make sure your registrar allows it.

 You will essentially need to:
- - replace any occurrence of `local-ip.sh` in `.go` files with your domain
- - replace the hardcoded IP addresses in the `hardcodedRecords` map declared in [`xip.go:37`](./xip/xip.go#L37), the important records to keep are:
-   - `A ns.local-ip.sh.` holds both IP addresses pointing to `ns1.` and `ns2.`
-   - `A ns1.local-ip.sh.` holds the first IP address pointing to the server hosting local-ip.sh
-   - `A ns2.local-ip.sh.` holds the second IP address pointing to the server, exists for redundancy
-   - `TXT _acme-challenge.local-ip.sh.` will temporarily hold the value to solve the DNS-01 challenge
- - set your domain's glue records to point to the IP addresses you set for `ns1.` and `ns2.`
- - retrieve the certificate files once the program is up and running
+ - set your domain's glue records to point to the IP addresses you will set for `XIP_NAMESERVERS` / `--nameservers`
+ - configure `local-ip.sh` with the domain, admin email address, and nameservers
+ - ensure you have some sort of persistent storage for the `./.lego` directory, this is where the ACME account and certificate files are stored, you don't want to lose this between deployments
--- a/certs/account.go
+++ b/certs/account.go
@ -36,7 +36,8 @@ func (u *Account) GetPrivateKey() crypto.PrivateKey {
 }

 func LoadAccount() *Account {
-	jsonBytes, err := os.ReadFile(accountFilePath)
+	config := utils.GetConfig()
+	jsonBytes, err := os.ReadFile(config.AccountFilePath)
 	if err != nil {
 		if strings.Contains(err.Error(), "no such file or directory") {
 			RegisterAccount()
@ -51,7 +52,7 @@ func LoadAccount() *Account {
 		utils.Logger.Fatal().Err(err).Msg("Failed to unmarshal account JSON file")
 	}

-	privKey, err := os.ReadFile(keyFilePath)
+	privKey, err := os.ReadFile(config.KeyFilePath)
 	if err != nil {
 		utils.Logger.Fatal().Err(err).Msg("Failed to read account's private key file")
 	}
@ -61,41 +62,42 @@ func LoadAccount() *Account {
 }

 func RegisterAccount() {
+	config := utils.GetConfig()
 	privateKey, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
 	if err != nil {
 		utils.Logger.Fatal().Err(err).Msg("Failed to generate account key")
 	}

 	account := &Account{
-		Email: email,
+		Email: config.Email,
 		key:   privateKey,
 	}
-	config := lego.NewConfig(account)
-	config.CADirURL = caDirUrl
-	legoClient, err := lego.NewClient(config)
+	legoConfig := lego.NewConfig(account)
+	legoConfig.CADirURL = config.CADirURL
+	legoClient, err := lego.NewClient(legoConfig)
 	if err != nil {
-		utils.Logger.Fatal().Err(err).Str("CA Directory URL", config.CADirURL).Msg("Failed to initialize lego client")
+		utils.Logger.Fatal().Err(err).Str("CA Directory URL", legoConfig.CADirURL).Msg("Failed to initialize lego client")
 	}

 	reg, err := legoClient.Registration.Register(registration.RegisterOptions{TermsOfServiceAgreed: true})
 	if err != nil {
-		utils.Logger.Fatal().Err(err).Str("CA Directory URL", config.CADirURL).Msg("Failed to register account to ACME server")
+		utils.Logger.Fatal().Err(err).Str("CA Directory URL", legoConfig.CADirURL).Msg("Failed to register account to ACME server")
 	}
 	if reg.Body.Status != "valid" {
-		utils.Logger.Fatal().Err(err).Str("CA Directory URL", config.CADirURL).Msgf("Registration failed with status %s", reg.Body.Status)
+		utils.Logger.Fatal().Err(err).Str("CA Directory URL", legoConfig.CADirURL).Msgf("Registration failed with status %s", reg.Body.Status)
 	}

 	utils.Logger.Debug().
-		Str("CA Directory URL", config.CADirURL).
+		Str("CA Directory URL", legoConfig.CADirURL).
 		Bool("TermsOfServiceAgreed", reg.Body.TermsOfServiceAgreed).
 		Msg("Successfully registered account to ACME server")
 	account.Registration = reg

-	os.MkdirAll(filepath.Dir(keyFilePath), os.ModePerm)
+	os.MkdirAll(filepath.Dir(config.KeyFilePath), os.ModePerm)
 	privKey := encode(privateKey)
-	err = os.WriteFile(keyFilePath, []byte(privKey), 0o644)
+	err = os.WriteFile(config.KeyFilePath, []byte(privKey), 0o644)
 	if err != nil {
-		utils.Logger.Fatal().Err(err).Str("path", keyFilePath).Msg("Failed to write account's private key file")
+		utils.Logger.Fatal().Err(err).Str("path", config.KeyFilePath).Msg("Failed to write account's private key file")
 	}

 	jsonBytes, err := json.MarshalIndent(account, "", "\t")
@ -103,10 +105,10 @@ func RegisterAccount() {
 		utils.Logger.Fatal().Err(err).Msg("Failed to marshal account JSON file")
 	}

-	os.MkdirAll(filepath.Dir(accountFilePath), os.ModePerm)
-	err = os.WriteFile(accountFilePath, jsonBytes, 0o600)
+	os.MkdirAll(filepath.Dir(config.AccountFilePath), os.ModePerm)
+	err = os.WriteFile(config.AccountFilePath, jsonBytes, 0o600)
 	if err != nil {
-		utils.Logger.Fatal().Err(err).Str("path", accountFilePath).Msg("Failed to write account's JSON file")
+		utils.Logger.Fatal().Err(err).Str("path", config.AccountFilePath).Msg("Failed to write account's JSON file")
 	}
 }

--- a/certs/certs.go
+++ b/certs/certs.go
@ -27,14 +27,15 @@ func (c *certsClient) RequestCertificates() {
 }

 func (c *certsClient) requestCertificate(certType string) {
+	config := utils.GetConfig()
 	var lastCertificate *certificate.Resource
 	var domains []string
 	if certType == "wildcard" {
 		lastCertificate = c.lastWildcardCertificate
-		domains = []string{"*.local-ip.sh"}
+		domains = []string{fmt.Sprintf("*.%s", config.Domain)}
 	} else if certType == "root" {
 		lastCertificate = c.lastRootCertificate
-		domains = []string{"local-ip.sh"}
+		domains = []string{config.Domain}
 	} else {
 		utils.Logger.Fatal().Msgf("Unexpected certType %s. Only \"wildcard\" and \"root\" are supported", certType)
 	}
@ -119,9 +120,10 @@ func persistFiles(certificates *certificate.Resource, certType string) {
 }

 func NewCertsClient(xip *xip.Xip, user *Account) *certsClient {
-	config := lego.NewConfig(user)
-	config.CADirURL = caDirUrl
-	legoClient, err := lego.NewClient(config)
+	config := utils.GetConfig()
+	legoConfig := lego.NewConfig(user)
+	legoConfig.CADirURL = config.CADirURL
+	legoClient, err := lego.NewClient(legoConfig)
 	if err != nil {
 		utils.Logger.Fatal().Err(err).Msg("Failed to initialize lego client")
 	}
--- a/certs/config.go
+++ b/certs/config.go
@ -1,21 +0,0 @@
-package certs
-
-import (
-	"fmt"
-	"net/url"
-
-	"github.com/go-acme/lego/v4/lego"
-)
-
-const (
-	email    = "admin@local-ip.sh"
-	caDirUrl = lego.LEDirectoryProduction
-	// caDirUrl = lego.LEDirectoryStaging
-)
-
-var (
-	parsedCaDirUrl, _ = url.Parse(caDirUrl)
-	caDirHostname     = parsedCaDirUrl.Hostname()
-	accountFilePath   = fmt.Sprintf("./.lego/accounts/%s/%s/account.json", caDirHostname, email)
-	keyFilePath       = fmt.Sprintf("./.lego/accounts/%s/%s/keys/%s.key", caDirHostname, email, email)
-)
--- a/cmd/root.go
+++ b/cmd/root.go
@ -0,0 +1,111 @@
+package cmd
+
+import (
+	"fmt"
+	"net/mail"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/asaskevich/govalidator"
+	"github.com/go-acme/lego/v4/lego"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"local-ip.sh/certs"
+	"local-ip.sh/http"
+	"local-ip.sh/utils"
+	"local-ip.sh/xip"
+)
+
+var command = &cobra.Command{
+	Use: "local-ip.sh",
+	PreRun: func(cmd *cobra.Command, args []string) {
+		viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+		viper.SetEnvPrefix("XIP")
+		viper.AutomaticEnv()
+
+		email := viper.GetString("Email")
+		_, err := mail.ParseAddress(email)
+		if err != nil {
+			utils.Logger.Fatal().Err(err).Msg("Invalid email address")
+		}
+
+		domain := viper.GetString("Domain")
+		if !govalidator.IsDNSName(domain) {
+			utils.Logger.Fatal().Err(err).Msg("Invalid domain")
+		}
+
+		nameservers := strings.Split(viper.GetString("nameservers"), ",")
+		for _, ns := range nameservers {
+			if !govalidator.IsIPv4(ns) {
+				utils.Logger.Fatal().Err(err).Str("ns", ns).Msg("Invalid name server")
+			}
+		}
+		viper.Set("NameServers", nameservers)
+
+		staging := viper.GetBool("staging")
+		var caDir string
+		if staging {
+			caDir = lego.LEDirectoryStaging
+		} else {
+			caDir = lego.LEDirectoryProduction
+		}
+		viper.Set("CADirURL", caDir)
+
+		parsedCaDirUrl, _ := url.Parse(caDir)
+		caDirHostname := parsedCaDirUrl.Hostname()
+		viper.Set("AccountFilePath", fmt.Sprintf("./.lego/accounts/%s/%s/account.json", caDirHostname, email))
+		viper.Set("KeyFilePath", fmt.Sprintf("./.lego/accounts/%s/%s/keys/%s.key", caDirHostname, email, email))
+
+		utils.InitConfig()
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		n := xip.NewXip()
+
+		go func() {
+			// try to obtain certificates once the DNS server is accepting requests
+			account := certs.LoadAccount()
+			certsClient := certs.NewCertsClient(n, account)
+
+			time.Sleep(5 * time.Second)
+			certsClient.RequestCertificates()
+
+			for {
+				// afterwards, try to renew certificates once a day
+				time.Sleep(24 * time.Hour)
+				certsClient.RequestCertificates()
+			}
+		}()
+
+		go http.ServeHttp()
+
+		n.StartServer()
+	},
+}
+
+func Execute() {
+	command.Flags().Uint("dns-port", 53, "Port for the DNS server")
+	viper.BindPFlag("dns-port", command.Flags().Lookup("dns-port"))
+
+	command.Flags().Uint("http-port", 80, "Port for the HTTP server")
+	viper.BindPFlag("http-port", command.Flags().Lookup("http-port"))
+
+	command.Flags().Uint("https-port", 443, "Port for the HTTPS server")
+	viper.BindPFlag("https-port", command.Flags().Lookup("https-port"))
+
+	command.Flags().Bool("staging", false, "Enable to use the Let's Encrypt staging environment to obtain certificates")
+	viper.BindPFlag("staging", command.Flags().Lookup("staging"))
+
+	command.Flags().String("domain", "", "Root domain (required)")
+	viper.BindPFlag("domain", command.Flags().Lookup("domain"))
+
+	command.Flags().String("email", "", "ACME account email address (required)")
+	viper.BindPFlag("email", command.Flags().Lookup("email"))
+
+	command.Flags().String("nameservers", "", "List of nameservers separated by commas (required)")
+	viper.BindPFlag("nameservers", command.Flags().Lookup("nameservers"))
+
+	if err := command.Execute(); err != nil {
+		utils.Logger.Fatal().Err(err).Msg("Failed to run local-ip.sh")
+	}
+}
--- a/compose.yml
+++ b/compose.yml
@ -1,14 +1,19 @@
 services:
-  local-ip.sh:
-    image: local-ip.sh
-    build: .
-    volumes:
-      - lego:/local-ip/.lego
-    restart: unless-stopped
-    ports:
-      - 53:53/udp
-      - 80:80/tcp
-      - 443:443/tcp
+    local-ip.sh:
+        image: local-ip.sh
+        build: .
+        volumes:
+            - lego:/local-ip/.lego
+        restart: unless-stopped
+        environment:
+            XIP_DOMAIN: "local-ip.sh"
+            XIP_EMAIL: "admin@local-ip.sh"
+            XIP_NAMESERVERS: "137.66.40.11,137.66.40.12"
+            # XIP_STAGING: true
+        ports:
+            - 53:53/udp
+            - 80:80/tcp
+            - 443:443/tcp

 volumes:
-  lego:
+    lego:
--- a/fly.toml
+++ b/fly.toml
@ -1,8 +1,3 @@
-# fly.toml app configuration file generated for local-ip-ancient-glade-4376 on 2023-11-29T11:43:10+01:00
-#
-# See https://fly.io/docs/reference/configuration/ for information about how to use this file.
-#
-
 app = "local-ip"
 primary_region = "ams"
 kill_signal = "SIGINT"
@ -14,7 +9,9 @@ auto_rollback = true
 [build]

 [env]
-PORT = "53"
+XIP_DOMAIN = "local-ip.sh"
+XIP_EMAIL = "admin@local-ip.sh"
+XIP_NAMESERVERS = "137.66.40.11,137.66.40.12" # fly.io edge-only ip addresses, see https://community.fly.io/t/custom-domains-certificate-is-stuck-on-awaiting-configuration/8329

 [mounts]
 source = "lego"
--- a/go.mod
+++ b/go.mod
@ -3,21 +3,42 @@ module local-ip.sh
 go 1.22

 require (
+	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2
 	github.com/go-acme/lego/v4 v4.10.1
 	github.com/miekg/dns v1.1.57
 	github.com/rs/zerolog v1.33.0
-	golang.org/x/net v0.17.0
+	github.com/spf13/cobra v1.8.1
+	github.com/spf13/viper v1.19.0
+	golang.org/x/net v0.23.0
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1
 )

 require (
 	github.com/cenkalti/backoff/v4 v4.2.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/go-jose/go-jose/v3 v3.0.0 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	golang.org/x/crypto v0.14.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/multierr v1.9.0 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
 	golang.org/x/mod v0.12.0 // indirect
 	golang.org/x/sys v0.22.0 // indirect
-	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/tools v0.13.0 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
--- a/go.sum
+++ b/go.sum
@ -1,16 +1,35 @@
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/cenkalti/backoff/v4 v4.2.0 h1:HN5dHm3WBOgndBH6E8V0q2jIYIR3s9yglV8k/+MN3u4=
 github.com/cenkalti/backoff/v4 v4.2.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/magiconair/properties v1.8.7/go.mod h1:Dhd985XPs7jluiymwWYZ0G4Z61jb3vdS329zhj2hYo0=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
@ -19,27 +38,66 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
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+github.com/pelletier/go-toml/v2 v2.2.2 h1:aYUidT7k73Pcl9nb2gScu7NSrKCSHIDE89b3+6Wq+LM=
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 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
-golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
-golang.org/x/sync v0.4.0 h1:zxkM55ReGkDlKSM+Fu41A+zmbZuaPVbGMzvvdUPznYQ=
-golang.org/x/sync v0.4.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
+golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@ -48,12 +106,16 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
 golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
-golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
+gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/http/server.go
+++ b/http/server.go
@ -2,8 +2,11 @@ package http

 import (
 	"context"
+	"fmt"
+	"net"
 	"net/http"
 	"os"
+	"strconv"
 	"strings"
 	"time"

@ -45,8 +48,9 @@ func registerHandlers() {
 }

 func serveHttp() *http.Server {
-	utils.Logger.Info().Msg("Starting up HTTP server on :80")
-	httpServer := &http.Server{Addr: ":http"}
+	config := utils.GetConfig()
+	httpServer := &http.Server{Addr: fmt.Sprintf(":%d", config.HttpPort)}
+	utils.Logger.Info().Str("http_address", httpServer.Addr).Msg("Starting up HTTP server")
 	go func() {
 		err := httpServer.ListenAndServe()
 		if err != http.ErrServerClosed {
@ -84,22 +88,40 @@ func killServer(httpServer *http.Server) {
 }

 func redirectHttpToHttps() {
-	utils.Logger.Info().Msg("Redirecting HTTP traffic from :80 to HTTPS :443")
+	config := utils.GetConfig()
 	httpServer := &http.Server{
-		Addr: ":http",
+		Addr: fmt.Sprintf(":%d", config.HttpPort),
 		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			url := r.URL
+			host := r.Host
+
+			// Strip the port from the host if present
+			if strings.Contains(host, ":") {
+				hostWithoutPort, _, err := net.SplitHostPort(host)
+				if err != nil {
+					utils.Logger.Error().Err(err).Msg("Failed to split host and port")
+				} else {
+					host = hostWithoutPort
+				}
+			}
+			// Add the HTTPS port only if it's not 443
+			if config.HttpsPort != 443 {
+				host = net.JoinHostPort(host, strconv.FormatUint(uint64(config.HttpsPort), 10))
+			}
+
 			url.Host = r.Host
 			url.Scheme = "https"
 			http.Redirect(w, r, url.String(), http.StatusMovedPermanently)
 		}),
 	}
+	utils.Logger.Info().Str("http_address", httpServer.Addr).Msg("Redirecting HTTP traffic to HTTPS")
 	go httpServer.ListenAndServe()
 }

 func serveHttps() {
-	utils.Logger.Info().Msg("Starting up HTTPS server on :443")
-	httpsServer := &http.Server{Addr: ":https"}
+	config := utils.GetConfig()
+	httpsServer := &http.Server{Addr: fmt.Sprintf(":%d", config.HttpsPort)}
+	utils.Logger.Info().Str("https_address", httpsServer.Addr).Msg("Starting up HTTPS server")
 	go httpsServer.ListenAndServeTLS("./.lego/certs/root/server.pem", "./.lego/certs/root/server.key")
 }

--- a/main.go
+++ b/main.go
@ -1,35 +1,9 @@
 package main

 import (
-	"flag"
-	"time"
-
-	"local-ip.sh/certs"
-	"local-ip.sh/http"
-	"local-ip.sh/xip"
+	"local-ip.sh/cmd"
 )

 func main() {
-	port := flag.Int("port", 53, "port the DNS server should bind to")
-	flag.Parse()
-
-	n := xip.NewXip(*port)
-
-	go func() {
-		account := certs.LoadAccount()
-		certsClient := certs.NewCertsClient(n, account)
-
-		time.Sleep(5 * time.Second)
-		certsClient.RequestCertificates()
-
-		for {
-			// try to renew certificate every day
-			time.Sleep(24 * time.Hour)
-			certsClient.RequestCertificates()
-		}
-	}()
-
-	go http.ServeHttp()
-
-	n.StartServer()
+	cmd.Execute()
 }
--- a/utils/config.go
+++ b/utils/config.go
@ -0,0 +1,29 @@
+package utils
+
+import (
+	"github.com/spf13/viper"
+)
+
+type config struct {
+	DnsPort   uint `mapstructure:"dns-port"`
+	HttpPort  uint `mapstructure:"http-port"`
+	HttpsPort uint `mapstructure:"https-port"`
+	Domain    string
+	Email     string
+
+	NameServers     []string
+	CADirURL        string
+	AccountFilePath string
+	KeyFilePath     string
+}
+
+var conf = &config{}
+
+func InitConfig() *config {
+	viper.Unmarshal(conf)
+	return conf
+}
+
+func GetConfig() *config {
+	return conf
+}
--- a/xip/records.go
+++ b/xip/records.go
@ -0,0 +1,52 @@
+package xip
+
+import (
+	"net"
+
+	"github.com/miekg/dns"
+)
+
+type hardcodedRecord struct {
+	A     []net.IP // => dns.A
+	AAAA  []net.IP // => dns.AAAA
+	TXT   []string // => dns.TXT
+	MX    []*dns.MX
+	CNAME []string // => dns.CNAME
+	SRV   *dns.SRV
+}
+
+var hardcodedRecords = map[string]hardcodedRecord{
+	// additional records I set up to host emails, feel free to change or remove them for your own needs
+	"local-ip.sh.": {
+		TXT: []string{"v=spf1 include:capsulecorp.dev ~all"},
+		MX: []*dns.MX{
+			{Preference: 10, Mx: "email.capsulecorp.dev."},
+		},
+	},
+	"autodiscover.local-ip.sh.": {
+		CNAME: []string{
+			"email.capsulecorp.dev.",
+		},
+	},
+	"_autodiscover._tcp.local-ip.sh.": {
+		SRV: &dns.SRV{
+			Priority: 0,
+			Weight:   0,
+			Port:     443,
+			Target:   "email.capsulecorp.dev.",
+		},
+	},
+	"autoconfig.local-ip.sh.": {
+		CNAME: []string{
+			"email.capsulecorp.dev.",
+		},
+	},
+	"_dmarc.local-ip.sh.": {
+		TXT: []string{"v=DMARC1; p=none; rua=mailto:postmaster@local-ip.sh; ruf=mailto:admin@local-ip.sh"},
+	},
+	"dkim._domainkey.local-ip.sh.": {
+		TXT: []string{
+			"v=DKIM1;k=rsa;t=s;s=email;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsMW6NFo34qzKRPbzK41GwbWncB8IDg1i2eA2VWznIVDmTzzsqILaBOGv2xokVpzZm0QRF9wSbeVUmvwEeQ7Z6wkfMjawenDEc3XxsNSvQUVBP6LU/xcm1zsR8wtD8r5J+Jm45pNFaateiM/kb/Eypp2ntdtd8CPsEgCEDpNb62LWdy0yzRdZ/M/fNn51UMN8hVFp4YfZngAt3bQwa6kPtgvTeqEbpNf5xanpDysNJt2S8zfqJMVGvnr8JaJiTv7ZlKMMp94aC5Ndcir1WbMyfmgSnGgemuCTVMWDGPJnXDi+8BQMH1b1hmTpWDiVdVlehyyWx5AfPrsWG9cEuDIfXwIDAQAB",
+		},
+	},
+}
--- a/xip/xip.go
+++ b/xip/xip.go
@ -14,120 +14,50 @@ import (

 type Xip struct {
 	server      dns.Server
-	nameServers []*dns.NS
+	nameServers []string
 }

-type HardcodedRecord struct {
-	A     []net.IP // => dns.A
-	AAAA  []net.IP // => dns.AAAA
-	TXT   []string // => dns.TXT
-	MX    []*dns.MX
-	CNAME []string // => dns.CNAME
-	SRV   *dns.SRV
-}
-
-const (
-	zone        = "local-ip.sh."
-	nameservers = "ns1.local-ip.sh.,ns2.local-ip.sh."
-)
-
 var (
-	flyRegion        = os.Getenv("FLY_REGION")
-	dottedIpV4Regex  = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4})($|[.-])`)
-	dashedIpV4Regex  = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\-?\b){4})($|[.-])`)
-	hardcodedRecords = map[string]HardcodedRecord{
-		"ns.local-ip.sh.": {
-			// record holding ip addresses of ns1 and ns2
-			A: []net.IP{
-				net.IPv4(137, 66, 40, 11),
-				net.IPv4(137, 66, 40, 12),
-			},
-		},
-		"ns1.local-ip.sh.": {
-			A: []net.IP{
-				net.IPv4(137, 66, 40, 11), // fly.io edge-only ip address, see https://community.fly.io/t/custom-domains-certificate-is-stuck-on-awaiting-configuration/8329
-			},
-		},
-		"ns2.local-ip.sh.": {
-			A: []net.IP{
-				net.IPv4(137, 66, 40, 12), // fly.io edge-only ip address #2
-			},
-		},
-		"local-ip.sh.": {
-			A: []net.IP{
-				net.IPv4(137, 66, 40, 11), // fly.io edge-only ip address
-			},
-			TXT: []string{"v=spf1 include:capsulecorp.dev ~all"},
-			MX: []*dns.MX{
-				{Preference: 10, Mx: "email.capsulecorp.dev."},
-			},
-		},
-		"autodiscover.local-ip.sh.": {
-			CNAME: []string{
-				"email.capsulecorp.dev.",
-			},
-		},
-		"_autodiscover._tcp.local-ip.sh.": {
-			SRV: &dns.SRV{
-				Priority: 0,
-				Weight:   0,
-				Port:     443,
-				Target:   "email.capsulecorp.dev.",
-			},
-		},
-		"autoconfig.local-ip.sh.": {
-			CNAME: []string{
-				"email.capsulecorp.dev.",
-			},
-		},
-		"_dmarc.local-ip.sh.": {
-			TXT: []string{"v=DMARC1; p=none; rua=mailto:postmaster@local-ip.sh; ruf=mailto:admin@local-ip.sh"},
-		},
-		"dkim._domainkey.local-ip.sh.": {
-			TXT: []string{
-				"v=DKIM1;k=rsa;t=s;s=email;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsMW6NFo34qzKRPbzK41GwbWncB8IDg1i2eA2VWznIVDmTzzsqILaBOGv2xokVpzZm0QRF9wSbeVUmvwEeQ7Z6wkfMjawenDEc3XxsNSvQUVBP6LU/xcm1zsR8wtD8r5J+Jm45pNFaateiM/kb/Eypp2ntdtd8CPsEgCEDpNb62LWdy0yzRdZ/M/fNn51UMN8hVFp4YfZngAt3bQwa6kPtgvTeqEbpNf5xanpDysNJt2S8zfqJMVGvnr8JaJiTv7ZlKMMp94aC5Ndcir1WbMyfmgSnGgemuCTVMWDGPJnXDi+8BQMH1b1hmTpWDiVdVlehyyWx5AfPrsWG9cEuDIfXwIDAQAB",
-			},
-		},
-		"_acme-challenge.local-ip.sh.": {
-			// will be filled in later when requesting the wildcard certificate
-			TXT: []string{},
-		},
-	}
+	flyRegion       = os.Getenv("FLY_REGION")
+	dottedIpV4Regex = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\.?\b){4})($|[.-])`)
+	dashedIpV4Regex = regexp.MustCompile(`(?:^|(?:[\w\d])+\.)(((25[0-5]|(2[0-4]|1\d|[1-9]|)\d)\-?\b){4})($|[.-])`)
 )

 func (xip *Xip) SetTXTRecord(fqdn string, value string) {
 	utils.Logger.Debug().Str("fqdn", fqdn).Str("value", value).Msg("Trying to set TXT record")
-	if fqdn != "_acme-challenge.local-ip.sh." {
+	config := utils.GetConfig()
+	if fqdn != fmt.Sprintf("_acme-challenge.%s.", config.Domain) {
 		utils.Logger.Debug().Msg("Not allowed, abort")
 		return
 	}

-	if records, ok := hardcodedRecords[fqdn]; ok {
-		records.TXT = []string{value}
-		hardcodedRecords["_acme-challenge.local-ip.sh."] = records
+	if rootRecords, ok := hardcodedRecords[fqdn]; ok {
+		rootRecords.TXT = []string{value}
+		hardcodedRecords[fmt.Sprintf("_acme-challenge.%s.", config.Domain)] = rootRecords
 	}
 }

 func (xip *Xip) UnsetTXTRecord(fqdn string) {
 	utils.Logger.Debug().Str("fqdn", fqdn).Msg("Trying to set TXT record")
-	if fqdn != "_acme-challenge.local-ip.sh." {
+	config := utils.GetConfig()
+	if fqdn != fmt.Sprintf("_acme-challenge.%s.", config.Domain) {
 		utils.Logger.Debug().Msg("Not allowed, abort")
 		return
 	}

-	if records, ok := hardcodedRecords[fqdn]; ok {
-		records.TXT = []string{}
-		hardcodedRecords["_acme-challenge.local-ip.sh."] = records
+	if rootRecords, ok := hardcodedRecords[fqdn]; ok {
+		rootRecords.TXT = []string{}
+		hardcodedRecords[fmt.Sprintf("_acme-challenge.%s.", config.Domain)] = rootRecords
 	}
 }

 func (xip *Xip) fqdnToA(fqdn string) []*dns.A {
 	normalizedFqdn := strings.ToLower(fqdn)
 	if hardcodedRecords[normalizedFqdn].A != nil {
-		var records []*dns.A
+		var aRecords []*dns.A

 		for _, record := range hardcodedRecords[normalizedFqdn].A {
-			records = append(records, &dns.A{
+			aRecords = append(aRecords, &dns.A{
 				Hdr: dns.RR_Header{
 					Ttl:    uint32((time.Minute * 5).Seconds()),
 					Name:   fqdn,
@ -138,7 +68,7 @@ func (xip *Xip) fqdnToA(fqdn string) []*dns.A {
 			})
 		}

-		return records
+		return aRecords
 	}

 	for _, ipV4RE := range []*regexp.Regexp{dashedIpV4Regex, dottedIpV4Regex} {
@ -171,15 +101,15 @@ func (xip *Xip) answerWithAuthority(question dns.Question, message *dns.Msg) {

 func (xip *Xip) handleA(question dns.Question, message *dns.Msg) {
 	fqdn := question.Name
-	records := xip.fqdnToA(fqdn)
+	aRecords := xip.fqdnToA(fqdn)

-	if len(records) == 0 {
+	if len(aRecords) == 0 {
 		message.Rcode = dns.RcodeNameError
 		xip.answerWithAuthority(question, message)
 		return
 	}

-	for _, record := range records {
+	for _, record := range aRecords {
 		message.Answer = append(message.Answer, record)
 	}
 }
@ -217,10 +147,10 @@ func (xip *Xip) handleNS(question dns.Question, message *dns.Msg) {
 				Rrtype: dns.TypeNS,
 				Class:  dns.ClassINET,
 			},
-			Ns: ns.Ns,
+			Ns: ns,
 		})

-		additionals = append(additionals, xip.fqdnToA(ns.Ns)...)
+		additionals = append(additionals, xip.fqdnToA(ns)...)
 	}

 	for _, record := range nameServers {
@ -329,7 +259,15 @@ func (xip *Xip) handleSOA(question dns.Question, message *dns.Msg) {
 	message.Answer = append(message.Answer, xip.soaRecord(question))
 }

+func emailToRname(email string) string {
+	parts := strings.SplitN(email, "@", 2)
+	localPart := strings.ReplaceAll(parts[0], ".", "\\.")
+	domain := parts[1]
+	return localPart + "." + domain + "."
+}
+
 func (xip *Xip) soaRecord(question dns.Question) *dns.SOA {
+	config := utils.GetConfig()
 	soa := new(dns.SOA)
 	soa.Hdr = dns.RR_Header{
 		Name:     question.Name,
@ -338,9 +276,9 @@ func (xip *Xip) soaRecord(question dns.Question) *dns.SOA {
 		Ttl:      uint32((time.Minute * 5).Seconds()),
 		Rdlength: 0,
 	}
-	soa.Ns = "ns1.local-ip.sh."
-	soa.Mbox = "admin.local-ip.sh."
-	soa.Serial = 2022102800
+	soa.Ns = xip.nameServers[0]
+	soa.Mbox = emailToRname(config.Email)
+	soa.Serial = 2024072600
 	soa.Refresh = uint32((time.Minute * 15).Seconds())
 	soa.Retry = uint32((time.Minute * 15).Seconds())
 	soa.Expire = uint32((time.Minute * 30).Seconds())
@ -393,6 +331,7 @@ func (xip *Xip) handleDnsRequest(response dns.ResponseWriter, request *dns.Msg)

 		error := response.WriteMsg(message)
 		if error != nil {
+			utils.Logger.Debug().Msg(message.String())
 			utils.Logger.Error().Err(error).Str("message", message.String()).Msg("Error responding to query")
 		}
 	}()
@ -407,6 +346,7 @@ func (xip *Xip) StartServer() {
 	err := xip.server.ListenAndServe()
 	defer xip.server.Shutdown()
 	if err != nil {
+		utils.Logger.Fatal().Err(err).Msg("Failed to start DNS server")
 		if strings.Contains(err.Error(), "fly-global-services: no such host") {
 			// we're not running on fly, bind to 0.0.0.0 instead
 			port := strings.Split(xip.server.Addr, ":")[1]
@ -421,21 +361,43 @@ func (xip *Xip) StartServer() {

 		utils.Logger.Fatal().Err(err).Msg("Failed to start DNS server")
 	}
-	utils.Logger.Info().Str("dns_address", xip.server.Addr).Msg("DNS server listening")
+	utils.Logger.Info().Str("dns_address", xip.server.Addr).Msg("Starting up DNS server")
 }

-func NewXip(port int) (xip *Xip) {
-	xip = &Xip{}
+func (xip *Xip) initHardcodedRecords() {
+	config := utils.GetConfig()
+	rootDomainARecords := []net.IP{}

-	for _, ns := range strings.Split(nameservers, ",") {
-		xip.nameServers = append(xip.nameServers, &dns.NS{Ns: ns})
+	for i, ns := range config.NameServers {
+		name := fmt.Sprintf("ns%d.%s.", i+1, config.Domain)
+		ip := net.ParseIP(ns)
+
+		rootDomainARecords = append(rootDomainARecords, ip)
+		entry := hardcodedRecords[name]
+		entry.A = append(hardcodedRecords[name].A, ip)
+		hardcodedRecords[name] = entry
+
+		xip.nameServers = append(xip.nameServers, name)
 	}

+	hardcodedRecords[fmt.Sprintf("%s.", config.Domain)] = hardcodedRecord{A: rootDomainARecords}
+
+	// will be filled in later when requesting certificates
+	hardcodedRecords[fmt.Sprintf("_acme-challenge.%s.", config.Domain)] = hardcodedRecord{TXT: []string{}}
+}
+
+func NewXip() (xip *Xip) {
+	config := utils.GetConfig()
+	xip = &Xip{}
+
+	xip.initHardcodedRecords()
+
 	xip.server = dns.Server{
-		Addr: fmt.Sprintf(":%d", port),
+		Addr: fmt.Sprintf(":%d", config.DnsPort),
 		Net:  "udp",
 	}

+	zone := fmt.Sprintf("%s.", config.Domain)
 	dns.HandleFunc(zone, xip.handleDnsRequest)

 	return xip