diff --git a/inc/all.inc.php b/inc/all.inc.php
index 3637c59..e752e5b 100644
--- a/inc/all.inc.php
+++ b/inc/all.inc.php
@@ -2,9 +2,9 @@
 if (strpos($_SERVER['PHP_SELF'], "inc.php") !== false)
   exit("This file is meant to be included.");
 
-function addNiverLog($message, $outputLines, $returnCode) {
+function addNiverLog($message, $outputLines, $returnCode = false) {
   $logs = "\n" . date("Y-m-d H:i:s") . " " . $message . "\n";
-  if (isset($returnCode))
+  if ($returnCode !== false)
     $logs = $logs . "Return code: " . $returnCode . "\n";
   else
     $logs = $logs . "No return code logged\n";
diff --git a/inc/auth.inc.php b/inc/auth.inc.php
index 0e85d12..3a9f102 100644
--- a/inc/auth.inc.php
+++ b/inc/auth.inc.php
@@ -50,7 +50,7 @@ function antiCSRF() {
   if (!isset($_SERVER['HTTP_SEC_FETCH_SITE']) AND !isset($_SERVER['HTTP_ORIGIN']))
     exit("ERROR: Browser sent neither Sec-Fetch-Site nor Origin HTTP headers, so anti-CSRF verification can't be done.");
 
-  if (isset($_SERVER['HTTP_ORIGIN']) AND $_SERVER['HTTP_ORIGIN'] !== "https://niver.4.niv.re")
+  if (isset($_SERVER['HTTP_ORIGIN']) AND $_SERVER['HTTP_ORIGIN'] !== ORIGIN)
     exit("ERROR: Anti-CSRF verification failed");
 
   if (isset($_SERVER['HTTP_SEC_FETCH_SITE']) AND $_SERVER['HTTP_SEC_FETCH_SITE'] !== "same-origin")
diff --git a/inc/const.inc.php b/inc/const.inc.php
index eae9f01..b0baa36 100644
--- a/inc/const.inc.php
+++ b/inc/const.inc.php
@@ -5,8 +5,11 @@ if (strpos($_SERVER['PHP_SELF'], "inc.php") !== false)
 // --- Constants definitions ---
 
 // Public IP adresses (shown on the interface)
-define("IPV4_ADDRESS", "82.66.61.19");
-define("IPV6_ADDRESS", "2a01:e0a:15c:2e40:acab:3:3:3");
+define("IPV4_ADDRESS", "127.0.0.1");
+define("IPV6_ADDRESS", "::1");
+
+define("ORIGIN", "https://niver.test:42443");
+define("REGISTRY", "niver.test.");
 
 // Example IP adresses (for placeholders)
 define("IPV4_EXAMPLE", "203.0.113.42"); // See RFC5737: IPv4 Address Blocks Reserved for Documentation
@@ -14,7 +17,7 @@ define("IPV6_EXAMPLE", "2001:db8::3"); // See RFC3849: IPv6 Address Prefix Reser
 define("DOMAIN_EXAMPLE", "example"); // From RFC2606: Reserved Top Level DNS Names > 2. TLDs for Testing, & Documentation Examples
 
 // Custom Niver paths
-define("PREFIX", "/motrig"); // Prefix in URL, if any
+define("PREFIX", ""); // Prefix in URL, if any
 define("ROOT_PATH", "/var/www/niver" . PREFIX); // Niver's directory
 define("SERVICE", substr(dirname($_SERVER['PHP_SELF']), strlen(PREFIX) + 1));
 define("PAGE", basename($_SERVER['PHP_SELF'], '.php'));
@@ -29,8 +32,6 @@ define("TOR_CONFIG_PATH", "/etc/tor/instances/niver/torrc"); // Tor configuratio
 define("TOR_KEYS_PATH", "/var/lib/tor-instances/niver/keys"); // Tor keys directory
 // Knot
 define("KNOT_ZONES_PATH", "/var/lib/knot/zones"); // Knot zones directory
-// Twins
-define("TWINS_PATH", "/var/local/twins"); // Twins directory containing configuration and TLS certificates
 // Executable files (you can get the full path of a command with $ which <command>)
 define("KNOTC_PATH", "/usr/sbin/knotc");
 define("KEYMGR_PATH", "/usr/sbin/keymgr");
@@ -64,115 +65,11 @@ define("THEME", array(
   'lightHtColor' => "#FFFF00",
   'lightAuthColor' => "#00FF00",
 
-  //The old theme for both dark and light themes
-  /*'htColor' => "#FF0000",
-  'regColor' => "#DA03E5",
-  'authColor' => "#00FF00",
-  'nsColor' => "#00A5A5",*/
-
   'lightColor' => '#FFFFFF',
   'darkColor' => '#000000',
 ));
 
 // Public suffixes
 define("SUFFIXES", array(
-  "4.niv.re.",
-
-  "asso.4.niv.re.",
-  "org.4.niv.re.",
-  "perso.4.niv.re.",
-  "blog.4.niv.re.",
-  "me.4.niv.re.",
-
-  "edu.4.niv.re.",
-  "info.4.niv.re.",
-  "wiki.4.niv.re.",
-  "sci.4.niv.re.",
-
-  "pol.4.niv.re.",
-  "libre.4.niv.re.",
-  "fem.4.niv.re.",
-  "eco.4.niv.re.",
-  "veg.4.niv.re.",
-  "bio.4.niv.re.",
-  "anar.4.niv.re.",
-  "ancom.4.niv.re.",
-  "acab.4.niv.re.",
-  "handi.4.niv.re.",
-
-  "queer.4.niv.re.",
-  "gay.4.niv.re.",
-  "enby.4.niv.re.",
-  "trans.4.niv.re.",
-
-  "net.4.niv.re.",
-  "tech.4.niv.re.",
-  "io.4.niv.re.",
-  "sec.4.niv.re.",
-  "cyber.4.niv.re.",
-  "dev.4.niv.re.",
-  "geek.4.niv.re.",
-  "fs.4.niv.re.",
-  "ht.4.niv.re.",
-  "hyper.4.niv.re.",
-  "git.4.niv.re.",
-  "forge.4.niv.re.",
-  "code.4.niv.re.",
-  "lab.4.niv.re.",
-  "labs.4.niv.re.",
-  "gemini.4.niv.re.",
-  "gmi.4.niv.re.",
-  "gemlog.4.niv.re.",
-  "mail.4.niv.re.",
-  "ynh.4.niv.re.",
-  "yuno.4.niv.re.",
-  "sys.4.niv.re.",
-
-  "fed.4.niv.re.",
-  "fedi.4.niv.re.",
-  "soc.4.niv.re.",
-  "masto.4.niv.re.",
-  "plero.4.niv.re.",
-  "pix.4.niv.re.",
-  "mobi.4.niv.re.",
-
-  "art.4.niv.re.",
-  "music.4.niv.re.",
-  "video.4.niv.re.",
-  "draw.4.niv.re.",
-  "audio.4.niv.re.",
-  "ink.4.niv.re.",
-
-  "na.4.niv.re.",
-  "psy.4.niv.re.",
-  "neuro.4.niv.re.",
-  "auti.4.niv.re.",
-  "plur.4.niv.re.",
-
-  "blue.4.niv.re.",
-  "red.4.niv.re.",
-  "pink.4.niv.re.",
-  "green.4.niv.re.",
-  "black.4.niv.re.",
-
-  "city.4.niv.re.",
-  "town.4.niv.re.",
-  "cafe.4.niv.re.",
-  "home.4.niv.re.",
-  "forum.4.niv.re.",
-
-  "dream.4.niv.re.",
-  "space.4.niv.re.",
-  "forest.4.niv.re.",
-  "rain.4.niv.re.",
-  "snow.4.niv.re.",
-  "sun.4.niv.re.",
-  "earth.4.niv.re.",
-  "world.4.niv.re.",
-  "soft.4.niv.re.",
-  "cute.4.niv.re.",
-  "cutie.4.niv.re.",
-  "fun.4.niv.re.",
-  "play.4.niv.re.",
-  "game.4.niv.re.",
+  REGISTRY,
 ));
diff --git a/inc/form/form.ns.inc.php b/inc/form/form.ns.inc.php
index 726bc8c..21069d5 100644
--- a/inc/form/form.ns.inc.php
+++ b/inc/form/form.ns.inc.php
@@ -35,7 +35,7 @@
   <div>
     <label for="ttl-value">Valeur</label>
     <br>
-    <input required="" id="ttl-value" list="ttls" name="ttl-value" size="6" type="number" min="1" max="432000" value="3600" placeholder="3600">
+    <input required="" id="ttl-value" list="ttls" name="ttl-value" size="6" type="number" min="1" max="432000" value="10800" placeholder="10800">
     <datalist id="ttls">
       <option value="900">
       <option value="1800">
diff --git a/index.php b/index.php
index a48f206..6d2136b 100644
--- a/index.php
+++ b/index.php
@@ -1,9 +1,9 @@
 <?php require "top.inc.php"; ?>
 
 <dl>
-  <dt><a class="regButton" href="reg/">Registre 4.niv.re.</a></dt>
+  <dt><a class="regButton" href="reg/">Registre <code><?= REGISTRY ?></code></a></dt>
   <dd>
-    Demander l'attribution d'un sous-domaine de <code>4.niv.re.</code>
+    Demander l'attribution d'un sous-domaine de <code><?= REGISTRY ?></code>
   </dd>
   <dt><a class="nsButton" href="ns/">Serveurs de noms</a></dt>
   <dd>
diff --git a/reg/index.php b/reg/index.php
index 0839115..dda4860 100644
--- a/reg/index.php
+++ b/reg/index.php
@@ -3,11 +3,11 @@
 <dl>
   <dt><a class="regButton" href="register">Enregistrer un nouveau domaine</a></dt>
   <dd>
-    Prendre possession d'un sous-domaine de 4.niv.re.
+    Prendre possession d'un sous-domaine de <code><?= REGISTRY ?></code>
   </dd>
   <dt><a class="regButton" href="ns">Enregistrement <abbr title="Name Server">NS</abbr></a></dt>
   <dd>
-    Indiquer les serveurs de noms de son sous-domaine de 4.niv.re.
+    Indiquer les serveurs de noms de son sous-domaine de <code><?= REGISTRY ?></code>
   </dd>
   <dt><a class="regButton" href="ds">Enregistrement <abbr title="Delegation Signer">DS</abbr></a></dt>
   <dd>
@@ -15,7 +15,7 @@
   </dd>
   <dt><a class="regButton" href="glue">Glue Record</a></dt>
   <dd>
-    Indiquer les IP de ses serveurs de noms de son sous-domaine de 4.niv.re. dont les adresses se trouvent sur ce même sous-domaine
+    Indiquer les IP de ses serveurs de noms de son sous-domaine de <code><?= REGISTRY ?></code> dont les adresses se trouvent sur ce même sous-domaine
   </dd>
 </dl>
 
diff --git a/reg/ns.php b/reg/ns.php
index 5ab4e9e..897fcb0 100644
--- a/reg/ns.php
+++ b/reg/ns.php
@@ -45,10 +45,20 @@ if (isset($_POST['domain']) AND isset($_POST['action']) AND isset($_POST['ns'])
 
   $suffix = regGetUpperDomain($_POST['domain']);
 
-  exec(KNOTC_PATH . " zone-begin " . $suffix);
-  exec(KNOTC_PATH . " zone-" . $action . "set " . $suffix . " " . $_POST['domain'] . " 86400 NS " . $_POST['ns']);
-  exec(KNOTC_PATH . " zone-commit " . $suffix);
-  echo "Enregistrement NS ajouté";
+  exec(KNOTC_PATH . " zone-begin " . $suffix, $output);
+  exec(KNOTC_PATH . " zone-" . $action . "set " . $suffix . " " . $_POST['domain'] . " 86400 IN NS " . $_POST['ns'], $output);
+  exec(KNOTC_PATH . " zone-commit " . $suffix, $output);
+  foreach ($output as $line) {
+    if ($line !== "OK") {
+      $error = true;
+    }
+  }
+  if ($error) {
+    appendLog($output);
+    echo "An ERROR occured!";
+  } else {
+    echo "Modification effectuée avec succès";
+  }
 }
 
 ?>
diff --git a/reg/register.php b/reg/register.php
index 302acff..1d74964 100644
--- a/reg/register.php
+++ b/reg/register.php
@@ -16,119 +16,7 @@ Ce domaine doit être composé uniquement d'au moins 4 lettres latines non accen
       <label for="suffix">Suffixe</label>
       <br>
       <select required="" id="suffix" name="suffix">
-        <option selected="" value="4.niv.re.">.4.niv.re.</option>
-        <optgroup label="Organisations">
-          <option value="asso.4.niv.re.">.asso.4.niv.re.</option>
-          <option value="org.4.niv.re.">.org.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Personnels">
-          <option value="perso.4.niv.re.">.perso.4.niv.re.</option>
-          <option value="blog.4.niv.re.">.blog.4.niv.re.</option>
-          <option value="me.4.niv.re.">.me.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Connaissance">
-          <option value="edu.4.niv.re.">.edu.4.niv.re.</option>
-          <option value="info.4.niv.re.">.info.4.niv.re.</option>
-          <option value="wiki.4.niv.re.">.wiki.4.niv.re.</option>
-          <option value="sci.4.niv.re.">.sci.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Politique">
-          <option value="pol.4.niv.re.">.pol.4.niv.re.</option>
-          <option value="libre.4.niv.re.">.libre.4.niv.re.</option>
-          <option value="fem.4.niv.re.">.fem.4.niv.re.</option>
-          <option value="eco.4.niv.re.">.eco.4.niv.re.</option>
-          <option value="veg.4.niv.re.">.veg.4.niv.re.</option>
-          <option value="bio.4.niv.re.">.bio.4.niv.re.</option>
-          <option value="anar.4.niv.re.">.anar.4.niv.re.</option>
-          <option value="ancom.4.niv.re.">.ancom.4.niv.re.</option>
-          <option value="acab.4.niv.re.">.acab.4.niv.re.</option>
-          <option value="handi.4.niv.re.">.handi.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="LGBT+">
-          <option value="queer.4.niv.re.">.queer.4.niv.re.</option>
-          <option value="gay.4.niv.re.">.gay.4.niv.re.</option>
-          <option value="enby.4.niv.re.">.enby.4.niv.re.</option>
-          <option value="trans.4.niv.re.">.trans.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Technologie">
-          <option value="net.4.niv.re.">.net.4.niv.re.</option>
-          <option value="tech.4.niv.re.">.tech.4.niv.re.</option>
-          <option value="io.4.niv.re.">.io.4.niv.re.</option>
-          <option value="sec.4.niv.re.">.sec.4.niv.re.</option>
-          <option value="cyber.4.niv.re.">.cyber.4.niv.re.</option>
-          <option value="dev.4.niv.re.">.dev.4.niv.re.</option>
-          <option value="geek.4.niv.re.">.geek.4.niv.re.</option>
-          <option value="fs.4.niv.re.">.fs.4.niv.re.</option>
-          <option value="ht.4.niv.re.">.ht.4.niv.re.</option>
-          <option value="hyper.4.niv.re.">.hyper.4.niv.re.</option>
-          <option value="git.4.niv.re.">.git.4.niv.re.</option>
-          <option value="forge.4.niv.re.">.forge.4.niv.re.</option>
-          <option value="code.4.niv.re.">.code.4.niv.re.</option>
-          <option value="lab.4.niv.re.">.lab.4.niv.re.</option>
-          <option value="labs.4.niv.re.">.labs.4.niv.re.</option>
-          <option value="gemini.4.niv.re.">.gemini.4.niv.re.</option>
-          <option value="gmi.4.niv.re.">.gmi.4.niv.re.</option>
-          <option value="gemlog.4.niv.re.">.gemlog.4.niv.re.</option>
-          <option value="mail.4.niv.re.">.mail.4.niv.re.</option>
-          <option value="ynh.4.niv.re.">.ynh.4.niv.re.</option>
-          <option value="yuno.4.niv.re.">.yuno.4.niv.re.</option>
-          <option value="sys.4.niv.re.">.sys.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Fédiverse">
-          <option value="fed.4.niv.re.">.fed.4.niv.re.</option>
-          <option value="fedi.4.niv.re.">.fedi.4.niv.re.</option>
-          <option value="soc.4.niv.re.">.soc.4.niv.re.</option>
-          <option value="masto.4.niv.re.">.masto.4.niv.re.</option>
-          <option value="plero.4.niv.re.">.plero.4.niv.re.</option>
-          <option value="pix.4.niv.re.">.pix.4.niv.re.</option>
-          <option value="mobi.4.niv.re.">.mobi.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Arts">
-          <option value="art.4.niv.re.">.art.4.niv.re.</option>
-          <option value="music.4.niv.re.">.music.4.niv.re.</option>
-          <option value="video.4.niv.re.">.video.4.niv.re.</option>
-          <option value="draw.4.niv.re.">.draw.4.niv.re.</option>
-          <option value="audio.4.niv.re.">.audio.4.niv.re.</option>
-          <option value="ink.4.niv.re.">.ink.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Neurodiversité">
-          <option value="na.4.niv.re.">.na.4.niv.re.</option>
-          <option value="psy.4.niv.re.">.psy.4.niv.re.</option>
-          <option value="neuro.4.niv.re.">.neuro.4.niv.re.</option>
-          <option value="auti.4.niv.re.">.auti.4.niv.re.</option>
-          <option value="plur.4.niv.re.">.plur.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Couleurs">
-          <option value="blue.4.niv.re.">.blue.4.niv.re.</option>
-          <option value="red.4.niv.re.">.red.4.niv.re.</option>
-          <option value="pink.4.niv.re.">.pink.4.niv.re.</option>
-          <option value="green.4.niv.re.">.green.4.niv.re.</option>
-          <option value="black.4.niv.re.">.black.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Communauté">
-          <option value="city.4.niv.re.">.city.4.niv.re.</option>
-          <option value="town.4.niv.re.">.town.4.niv.re.</option>
-          <option value="cafe.4.niv.re.">.cafe.4.niv.re.</option>
-          <option value="home.4.niv.re.">.home.4.niv.re.</option>
-          <option value="forum.4.niv.re.">.forum.4.niv.re.</option>
-        </optgroup>
-        <optgroup label="Divers">
-          <option value="dream.4.niv.re.">.dream.4.niv.re.</option>
-          <option value="space.4.niv.re.">.space.4.niv.re.</option>
-          <option value="forest.4.niv.re.">.forest.4.niv.re.</option>
-          <option value="rain.4.niv.re.">.rain.4.niv.re.</option>
-          <option value="snow.4.niv.re.">.snow.4.niv.re.</option>
-          <option value="sun.4.niv.re.">.sun.4.niv.re.</option>
-          <option value="earth.4.niv.re.">.earth.4.niv.re.</option>
-          <option value="world.4.niv.re.">.world.4.niv.re.</option>
-          <option value="soft.4.niv.re.">.soft.4.niv.re.</option>
-          <option value="cute.4.niv.re.">.cute.4.niv.re.</option>
-          <option value="cutie.4.niv.re.">.cutie.4.niv.re.</option>
-          <option value="fun.4.niv.re.">.fun.4.niv.re.</option>
-          <option value="play.4.niv.re.">.play.4.niv.re.</option>
-          <option value="game.4.niv.re.">.game.4.niv.re.</option>
-        </optgroup>
-
+        <option selected="" value="<?= REGISTRY ?>">.<?= REGISTRY ?></option>
       </select>
     </div>
   </fieldset>
diff --git a/top.inc.php b/top.inc.php
index 5ed4f10..8779d4a 100644
--- a/top.inc.php
+++ b/top.inc.php
@@ -18,7 +18,7 @@ require "inc/pages.inc.php";
 if (
     isset($_COOKIE['niver']) // Resume session
   OR
-    (SERVICE === "auth"
+    (SERVICE === "auth" // Create new session
     AND PAGE === "login"
     AND isset($_POST['username']))
   ) {
@@ -38,12 +38,6 @@ if (
   ]);
 }
 
-// Redirect to the login page if not logged in
-if (SERVICE != "auth" AND !isset($_SESSION['username'])) {
-  header('Location: ' . PREFIX . '/auth/login?redir=' . SERVICE . "/" . PAGE, true, 302);
-  exit;
-}
-
 // Remove .php from URL (if any)
 if (substr($_SERVER['REQUEST_URI'], -4) == ".php") {
   header("Location: " . PREFIX . "/" . SERVICE . "/" . PAGE, true, 301); // 301 Moved Permanently