diff --git a/migrations/Version20241121135118.php b/migrations/Version20241121135118.php
new file mode 100644
index 0000000..ad42559
--- /dev/null
+++ b/migrations/Version20241121135118.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20241121135118 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE subnet CHANGE next_server next_server VARCHAR(255) DEFAULT NULL, CHANGE boot_file_name boot_file_name VARCHAR(255) DEFAULT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE subnet CHANGE next_server next_server VARCHAR(255) NOT NULL, CHANGE boot_file_name boot_file_name VARCHAR(255) NOT NULL');
+    }
+}
diff --git a/src/Dto/Input/SubnetInput.php b/src/Dto/Input/SubnetInput.php
index 98fed68..59d9726 100644
--- a/src/Dto/Input/SubnetInput.php
+++ b/src/Dto/Input/SubnetInput.php
@@ -17,21 +17,21 @@ final class SubnetInput
     public ?string $name = null;
 
     #[Assert\NotBlank(message: 'validators.subnet.netmask.not_blank')]
+    #[Assert\Ip(message: 'validators.subnet.netmask.invalid')]
     #[Groups(['subnet:write'])]
     #[ApiProperty(description: 'The netmask of the subnet', example: "")]
     public ?string $netmask = null;
 
     #[Assert\NotBlank(message: 'validators.subnet.ip_address.not_blank')]
+    #[Assert\Ip(message: 'validators.subnet.ip_address.invalid')]
     #[Groups(['subnet:write'])]
     #[ApiProperty(description: 'The ip address of the subnet', example: "")]
     public ?string $ipAddress = null;
 
-    #[Assert\NotBlank(message: 'validators.subnet.next_server.not_blank')]
     #[Groups(['subnet:write'])]
     #[ApiProperty(description: 'The next server of the subnet', example: "")]
     public ?string $nextServer = null;
 
-    #[Assert\NotBlank(message: 'validators.subnet.boot_file_name.not_blank')]
     #[Groups(['subnet:write'])]
     #[ApiProperty(description: 'The boot file name of the subnet', example: "")]
     public ?string $bootFileName = null;
diff --git a/src/Dto/Output/ClientOutput.php b/src/Dto/Output/ClientOutput.php
index d751f6d..818fbac 100644
--- a/src/Dto/Output/ClientOutput.php
+++ b/src/Dto/Output/ClientOutput.php
@@ -66,7 +66,7 @@ final class ClientOutput extends AbstractOutput
     #[Groups(['client:read', 'organizational-unit:read'])]
     public ?array $position = ['x' => 0, 'y' => 0];
 
-    #[Groups(['client:read'])]
+    #[Groups(['client:read', 'organizational-unit:read', 'pxe-template:read', 'trace:read', 'subnet:read'])]
     public ?string $status = '';
 
     #[Groups(['client:read'])]
diff --git a/src/Dto/Output/SubnetOutput.php b/src/Dto/Output/SubnetOutput.php
index e112d82..31ef891 100644
--- a/src/Dto/Output/SubnetOutput.php
+++ b/src/Dto/Output/SubnetOutput.php
@@ -22,10 +22,10 @@ final class SubnetOutput extends AbstractOutput
     public string $ipAddress;
 
     #[Groups(['subnet:read'])]
-    public string $nextServer;
+    public ?string $nextServer = null;
 
     #[Groups(['subnet:read'])]
-    public string $bootFileName;
+    public ?string $bootFileName = null;
 
     #[Groups(['subnet:read'])]
     public array $clients;
diff --git a/translations/validators.en.yaml b/translations/validators.en.yaml
index 2ed5bc8..03f3bd3 100644
--- a/translations/validators.en.yaml
+++ b/translations/validators.en.yaml
@@ -61,9 +61,7 @@ validators:
             not_blank: 'The name should not be blank.'
         ip_address:
             not_blank: 'The IP should not be blank.'
+            invalid: 'The IP address {{ value }} is not valid.'
         netmask:
             not_blank: 'The netmask should not be blank.'
-        boot_file_name:
-            not_blank: 'The boot file name should not be blank.'
-        next_server:
-            not_blank: 'The next server should not be blank.'
\ No newline at end of file
+            invalid: 'The netmask {{ value }} is not valid.'
diff --git a/translations/validators.es.yaml b/translations/validators.es.yaml
index a6bbf00..0f307d3 100644
--- a/translations/validators.es.yaml
+++ b/translations/validators.es.yaml
@@ -56,9 +56,7 @@ validators:
             not_blank: 'El nombre no debería estar vacío.'
         ip_address:
             not_blank: 'La dirección IP no debería estar vacía.'
+            invalid: 'La dirección IP {{ value }} no es válida.'
         netmask:
             not_blank: 'La máscara de red no debería estar vacía.'
-        boot_file_name:
-            not_blank: 'El nombre del archivo de arranque no debería estar vacío.'
-        next_server:
-            not_blank: 'El servidor no debería estar vacío.'
\ No newline at end of file
+            invalid: 'La máscara de red {{ value }} no es válida.'
\ No newline at end of file