diff --git a/core/lib/Controllers/FirewallController.php b/core/lib/Controllers/FirewallController.php
index 50203b9..bc54724 100644
--- a/core/lib/Controllers/FirewallController.php
+++ b/core/lib/Controllers/FirewallController.php
@@ -4,7 +4,9 @@ declare(strict_types=1);
 
 namespace KTXC\Controllers;
 
+use KTXC\Http\Request\Request;
 use KTXC\Http\Response\JsonResponse;
+use KTXC\Service\FirewallRuleConflictException;
 use KTXC\Service\SystemFirewallLogService;
 use KTXC\Service\SystemFirewallRuleService;
 use KTXC\Service\SystemFirewallStatusService;
@@ -106,6 +108,58 @@ final class FirewallController extends ControllerAbstract
         return $this->ruleResponse($this->systemRules->fetchRule($ruleId));
     }
 
+    #[AuthenticatedRoute(
+        '/firewall/rules',
+        name: 'firewall.tenant.rules.create',
+        methods: ['POST'],
+        permissions: [TenantFirewallRuleService::PERMISSION_MANAGE],
+    )]
+    public function createTenantRule(
+        Request $request,
+        string $type,
+        string $action,
+        string $value,
+        string $reason,
+        ?int $durationSeconds = null,
+        bool $confirmCurrentIp = false
+    ): JsonResponse {
+        return $this->mutationResponse(fn() => $this->tenantRules->createRule(
+            $type,
+            $action,
+            $value,
+            $reason,
+            $durationSeconds,
+            $request->getClientIp(),
+            $confirmCurrentIp
+        ));
+    }
+
+    #[AuthenticatedRoute(
+        '/firewall/system/rules',
+        name: 'firewall.system.rules.create',
+        methods: ['POST'],
+        permissions: [SystemFirewallRuleService::PERMISSION_MANAGE],
+    )]
+    public function createSystemRule(
+        Request $request,
+        string $type,
+        string $action,
+        string $value,
+        string $reason,
+        ?int $durationSeconds = null,
+        bool $confirmCurrentIp = false
+    ): JsonResponse {
+        return $this->mutationResponse(fn() => $this->systemRules->createRule(
+            $type,
+            $action,
+            $value,
+            $reason,
+            $durationSeconds,
+            $request->getClientIp(),
+            $confirmCurrentIp
+        ));
+    }
+
     #[AuthenticatedRoute(
         '/firewall/logs',
         name: 'firewall.tenant.logs.list',
@@ -231,4 +285,21 @@ final class FirewallController extends ControllerAbstract
             return new JsonResponse(['error' => $error->getMessage()], JsonResponse::HTTP_BAD_REQUEST);
         }
     }
+
+    private function mutationResponse(callable $mutation): JsonResponse
+    {
+        try {
+            return new JsonResponse(['rule' => $mutation()], JsonResponse::HTTP_CREATED);
+        } catch (FirewallRuleConflictException $error) {
+            return new JsonResponse(['error' => [
+                'code' => $error->conflictCode,
+                'message' => $error->getMessage(),
+            ]], JsonResponse::HTTP_CONFLICT);
+        } catch (\InvalidArgumentException $error) {
+            return new JsonResponse(['error' => [
+                'code' => 'invalid_firewall_rule',
+                'message' => $error->getMessage(),
+            ]], JsonResponse::HTTP_BAD_REQUEST);
+        }
+    }
 }
diff --git a/core/lib/Service/FirewallRuleConflictException.php b/core/lib/Service/FirewallRuleConflictException.php
new file mode 100644
index 0000000..354b765
--- /dev/null
+++ b/core/lib/Service/FirewallRuleConflictException.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace KTXC\Service;
+
+final class FirewallRuleConflictException extends \RuntimeException
+{
+    public function __construct(
+        public readonly string $conflictCode,
+        string $message
+    ) {
+        parent::__construct($message);
+    }
+}
diff --git a/core/lib/Service/FirewallRuleManager.php b/core/lib/Service/FirewallRuleManager.php
index b7ae416..021aa51 100644
--- a/core/lib/Service/FirewallRuleManager.php
+++ b/core/lib/Service/FirewallRuleManager.php
@@ -8,6 +8,7 @@ use KTXC\Models\Firewall\FirewallRuleObject;
 use KTXC\Stores\FirewallStore;
 use KTXF\Event\EventDispatcherInterface;
 use KTXF\Event\SecurityEvent;
+use KTXF\IpUtils;
 
 final class FirewallRuleManager
 {
@@ -84,6 +85,66 @@ final class FirewallRuleManager
         ];
     }
 
+    public function createManualRule(
+        FirewallRuleScope $scope,
+        string $type,
+        string $action,
+        string $value,
+        string $reason,
+        ?string $createdBy,
+        ?int $durationSeconds = null,
+        ?string $currentIp = null,
+        bool $confirmCurrentIp = false
+    ): FirewallRuleObject {
+        $reason = trim($reason);
+        if ($reason === '' || strlen($reason) > 1000) {
+            throw new \InvalidArgumentException('A rule reason containing 1-1000 bytes is required.');
+        }
+        if ($currentIp !== null) {
+            $currentIp = FirewallRuleValidator::ipAddress($currentIp);
+        }
+        if (
+            !$confirmCurrentIp
+            && $currentIp !== null
+            && $action === FirewallRuleObject::ACTION_BLOCK
+            && $this->matchesIp($type, $value, $currentIp)
+        ) {
+            throw new FirewallRuleConflictException(
+                'current_ip_confirmation_required',
+                'This rule would block your current IP address. Explicit confirmation is required.'
+            );
+        }
+
+        return match ([$type, $action]) {
+            [FirewallRuleObject::TYPE_IP, FirewallRuleObject::ACTION_BLOCK] =>
+                $this->blockIp($scope, $value, $reason, $createdBy, $durationSeconds),
+            [FirewallRuleObject::TYPE_IP, FirewallRuleObject::ACTION_ALLOW] =>
+                $durationSeconds === null
+                    ? $this->allowIp($scope, $value, $reason, $createdBy)
+                    : throw new \InvalidArgumentException('Temporary allow rules are not supported.'),
+            [FirewallRuleObject::TYPE_IP_RANGE, FirewallRuleObject::ACTION_BLOCK] =>
+                $durationSeconds === null
+                    ? $this->blockIpRange($scope, $value, $reason, $createdBy)
+                    : throw new \InvalidArgumentException('Temporary CIDR rules are not supported.'),
+            [FirewallRuleObject::TYPE_DEVICE, FirewallRuleObject::ACTION_BLOCK] =>
+                $this->blockDevice($scope, $value, $reason, $createdBy, $durationSeconds),
+            default => throw new \InvalidArgumentException('Unsupported firewall rule type and action combination.'),
+        };
+    }
+
+    private function matchesIp(string $type, string $value, string $currentIp): bool
+    {
+        if ($type === FirewallRuleObject::TYPE_IP) {
+            $value = FirewallRuleValidator::ipAddress($value);
+            return inet_pton($value) === inet_pton($currentIp);
+        }
+        if ($type === FirewallRuleObject::TYPE_IP_RANGE) {
+            return IpUtils::checkIp($currentIp, FirewallRuleValidator::cidr($value));
+        }
+
+        return false;
+    }
+
     public function blockIp(
         FirewallRuleScope $scope,
         string $ipAddress,
diff --git a/core/lib/Service/SystemFirewallRuleService.php b/core/lib/Service/SystemFirewallRuleService.php
index 4f49d3b..12af064 100644
--- a/core/lib/Service/SystemFirewallRuleService.php
+++ b/core/lib/Service/SystemFirewallRuleService.php
@@ -41,6 +41,29 @@ final class SystemFirewallRuleService
         return $this->rules->fetch(FirewallRuleScope::system(), $ruleId);
     }
 
+    public function createRule(
+        string $type,
+        string $action,
+        string $value,
+        string $reason,
+        ?int $durationSeconds = null,
+        ?string $currentIp = null,
+        bool $confirmCurrentIp = false
+    ): FirewallRuleObject {
+        $this->requirePermission(self::PERMISSION_MANAGE);
+        return $this->rules->createManualRule(
+            FirewallRuleScope::system(),
+            $type,
+            $action,
+            $value,
+            $reason,
+            $this->identity->identifier(),
+            $durationSeconds,
+            $currentIp,
+            $confirmCurrentIp
+        );
+    }
+
     public function blockIp(string $ip, ?string $reason = null, ?int $durationSeconds = null): FirewallRuleObject
     {
         $this->requirePermission(self::PERMISSION_MANAGE);
diff --git a/core/lib/Service/TenantFirewallRuleService.php b/core/lib/Service/TenantFirewallRuleService.php
index fa3d28d..ef9ba45 100644
--- a/core/lib/Service/TenantFirewallRuleService.php
+++ b/core/lib/Service/TenantFirewallRuleService.php
@@ -43,6 +43,29 @@ final class TenantFirewallRuleService
         return $this->rules->fetch($this->scope(), $ruleId);
     }
 
+    public function createRule(
+        string $type,
+        string $action,
+        string $value,
+        string $reason,
+        ?int $durationSeconds = null,
+        ?string $currentIp = null,
+        bool $confirmCurrentIp = false
+    ): FirewallRuleObject {
+        $this->requirePermission(self::PERMISSION_MANAGE);
+        return $this->rules->createManualRule(
+            $this->scope(),
+            $type,
+            $action,
+            $value,
+            $reason,
+            $this->identity->identifier(),
+            $durationSeconds,
+            $currentIp,
+            $confirmCurrentIp
+        );
+    }
+
     public function effectivePolicy(): array
     {
         $this->requirePermission(self::PERMISSION_READ);
diff --git a/shared/lib/IpUtils.php b/shared/lib/IpUtils.php
index df12766..dfd5953 100644
--- a/shared/lib/IpUtils.php
+++ b/shared/lib/IpUtils.php
@@ -95,6 +95,7 @@ class IpUtils
             if ($netmask < 0 || $netmask > 32) {
                 return self::setCacheResult($cacheKey, false);
             }
+            $netmask = (int)$netmask;
         } else {
             $address = $ip;
             $netmask = 32;
@@ -149,6 +150,7 @@ class IpUtils
             if ($netmask < 1 || $netmask > 128) {
                 return self::setCacheResult($cacheKey, false);
             }
+            $netmask = (int)$netmask;
         } else {
             if (!filter_var($ip, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6)) {
                 return self::setCacheResult($cacheKey, false);
diff --git a/tests/php/Integration/Stores/FirewallStoreTest.php b/tests/php/Integration/Stores/FirewallStoreTest.php
index 9cfe0db..2a103d8 100644
--- a/tests/php/Integration/Stores/FirewallStoreTest.php
+++ b/tests/php/Integration/Stores/FirewallStoreTest.php
@@ -488,6 +488,41 @@ class FirewallStoreTest extends TestCase
         self::assertSame('tenant-disabled', $disabled['items'][0]->getReason());
     }
 
+    #[TestDox('Administrative creation persists tenant and system ownership')]
+    public function testAdministrativeRuleCreation(): void
+    {
+        $manager = new FirewallRuleManager(
+            $this->store,
+            new FirewallRuleCache($this->store),
+            $this->createStub(EventDispatcherInterface::class)
+        );
+        $tenantRule = $manager->createManualRule(
+            FirewallRuleScope::tenant('tenant-a'),
+            FirewallRuleObject::TYPE_DEVICE,
+            FirewallRuleObject::ACTION_BLOCK,
+            'device-123',
+            'Compromised device',
+            'admin-a',
+            3600
+        );
+        $systemRule = $manager->createManualRule(
+            FirewallRuleScope::system(),
+            FirewallRuleObject::TYPE_IP_RANGE,
+            FirewallRuleObject::ACTION_BLOCK,
+            '198.51.100.0/24',
+            'Malicious network',
+            'system-admin',
+            currentIp: '203.0.113.10'
+        );
+
+        $persistedTenant = $this->store->fetchRule($tenantRule->getId());
+        $persistedSystem = $this->store->fetchRule($systemRule->getId());
+        self::assertSame('tenant-a', $persistedTenant->getTenantId());
+        self::assertSame(FirewallRuleObject::SCOPE_SYSTEM, $persistedSystem->getScope());
+        self::assertNull($persistedSystem->getTenantId());
+        self::assertSame('system-admin', $persistedSystem->getCreatedBy());
+    }
+
     #[TestDox('Administrative log queries enforce tenant scope and supported filters')]
     public function testAdministrativeLogQuery(): void
     {
diff --git a/tests/php/Unit/Controllers/FirewallControllerTest.php b/tests/php/Unit/Controllers/FirewallControllerTest.php
index b7fbf50..aaadcaf 100644
--- a/tests/php/Unit/Controllers/FirewallControllerTest.php
+++ b/tests/php/Unit/Controllers/FirewallControllerTest.php
@@ -7,6 +7,7 @@ namespace KTXT\Unit\Controllers;
 use KTXC\Context\IdentityContextInterface;
 use KTXC\Context\TenantContextInterface;
 use KTXC\Controllers\FirewallController;
+use KTXC\Http\Request\Request;
 use KTXC\Service\FirewallRuleCache;
 use KTXC\Service\FirewallRuleManager;
 use KTXC\Service\FirewallStatusService;
@@ -89,6 +90,39 @@ final class FirewallControllerTest extends TestCase
         self::assertSame(400, $this->controller->systemMetrics(since: 'not-a-date')->getStatusCode());
     }
 
+    #[TestDox('Current-IP blocks return a structured confirmation conflict')]
+    public function testCurrentIpConflict(): void
+    {
+        $this->store->expects(self::never())->method('depositRule');
+        $response = $this->controller->createTenantRule(
+            new Request(server: ['REMOTE_ADDR' => '203.0.113.10']),
+            'ip',
+            'block',
+            '203.0.113.10',
+            'Suspected abuse'
+        );
+        $data = json_decode($response->getContent(), true, flags: JSON_THROW_ON_ERROR);
+
+        self::assertSame(409, $response->getStatusCode());
+        self::assertSame('current_ip_confirmation_required', $data['error']['code']);
+    }
+
+    #[TestDox('Invalid manual rules return a stable validation response')]
+    public function testMutationValidation(): void
+    {
+        $response = $this->controller->createSystemRule(
+            new Request(server: ['REMOTE_ADDR' => '203.0.113.10']),
+            'device',
+            'allow',
+            'device-123',
+            'Trusted device'
+        );
+        $data = json_decode($response->getContent(), true, flags: JSON_THROW_ON_ERROR);
+
+        self::assertSame(400, $response->getStatusCode());
+        self::assertSame('invalid_firewall_rule', $data['error']['code']);
+    }
+
     #[TestDox('Every rule endpoint declares its scope-specific read permission')]
     public function testRoutePermissions(): void
     {
@@ -104,6 +138,8 @@ final class FirewallControllerTest extends TestCase
             'tenantConfiguration' => TenantFirewallStatusService::PERMISSION_SETTINGS_READ,
             'systemMetrics' => SystemFirewallLogService::PERMISSION_READ,
             'maintenanceStatus' => SystemFirewallStatusService::PERMISSION_MAINTENANCE_READ,
+            'createTenantRule' => TenantFirewallRuleService::PERMISSION_MANAGE,
+            'createSystemRule' => SystemFirewallRuleService::PERMISSION_MANAGE,
         ];
 
         foreach ($expected as $method => $permission) {
diff --git a/tests/php/Unit/Service/FirewallRuleManagerTest.php b/tests/php/Unit/Service/FirewallRuleManagerTest.php
index 8717780..0aa57f5 100644
--- a/tests/php/Unit/Service/FirewallRuleManagerTest.php
+++ b/tests/php/Unit/Service/FirewallRuleManagerTest.php
@@ -6,6 +6,7 @@ namespace KTXT\Unit\Service;
 
 use KTXC\Models\Firewall\FirewallRuleObject;
 use KTXC\Service\FirewallRuleCache;
+use KTXC\Service\FirewallRuleConflictException;
 use KTXC\Service\FirewallRuleManager;
 use KTXC\Service\FirewallRuleScope;
 use KTXC\Stores\FirewallStore;
@@ -77,6 +78,96 @@ class FirewallRuleManagerTest extends TestCase
         );
     }
 
+    #[TestDox('Manual rule creation requires a reason before persistence')]
+    public function testManualReason(): void
+    {
+        $this->store->expects(self::never())->method('depositRule');
+        $this->expectException(\InvalidArgumentException::class);
+
+        $this->manager->createManualRule(
+            FirewallRuleScope::tenant('tenant-a'),
+            FirewallRuleObject::TYPE_IP,
+            FirewallRuleObject::ACTION_BLOCK,
+            '203.0.113.10',
+            '   ',
+            'admin-a'
+        );
+    }
+
+    #[TestDox('Blocking the current exact IP requires explicit confirmation')]
+    public function testCurrentIpSafeguard(): void
+    {
+        $this->store->expects(self::never())->method('depositRule');
+        try {
+            $this->manager->createManualRule(
+                FirewallRuleScope::tenant('tenant-a'),
+                FirewallRuleObject::TYPE_IP,
+                FirewallRuleObject::ACTION_BLOCK,
+                '2001:db8::1',
+                'Confirmed abuse',
+                'admin-a',
+                currentIp: '2001:0db8:0:0:0:0:0:1'
+            );
+            self::fail('Current IP block should require confirmation.');
+        } catch (FirewallRuleConflictException $error) {
+            self::assertSame('current_ip_confirmation_required', $error->conflictCode);
+        }
+    }
+
+    #[TestDox('CIDR rules covering the current IP require explicit confirmation')]
+    public function testCurrentIpCidrSafeguard(): void
+    {
+        $this->store->expects(self::never())->method('depositRule');
+        $this->expectException(FirewallRuleConflictException::class);
+
+        $this->manager->createManualRule(
+            FirewallRuleScope::system(),
+            FirewallRuleObject::TYPE_IP_RANGE,
+            FirewallRuleObject::ACTION_BLOCK,
+            '203.0.113.0/24',
+            'Network abuse',
+            'admin-a',
+            currentIp: '203.0.113.10'
+        );
+    }
+
+    #[TestDox('Confirmed current-IP blocks retain manual audit context')]
+    public function testConfirmedCurrentIpBlock(): void
+    {
+        $this->store->method('findExactIpRule')->willReturn(null);
+        $this->store->expects(self::once())->method('depositRule')->willReturnArgument(0);
+
+        $rule = $this->manager->createManualRule(
+            FirewallRuleScope::tenant('tenant-a'),
+            FirewallRuleObject::TYPE_IP,
+            FirewallRuleObject::ACTION_BLOCK,
+            '203.0.113.10',
+            'Emergency lockout',
+            'admin-a',
+            currentIp: '203.0.113.10',
+            confirmCurrentIp: true
+        );
+
+        self::assertSame('Emergency lockout', $rule->getReason());
+        self::assertSame(FirewallRuleManager::ORIGIN_MANUAL, $rule->getMetadata()['origin']);
+    }
+
+    #[TestDox('Manual creation rejects unsupported type and action combinations')]
+    public function testUnsupportedManualRule(): void
+    {
+        $this->store->expects(self::never())->method('depositRule');
+        $this->expectException(\InvalidArgumentException::class);
+
+        $this->manager->createManualRule(
+            FirewallRuleScope::tenant('tenant-a'),
+            FirewallRuleObject::TYPE_DEVICE,
+            FirewallRuleObject::ACTION_ALLOW,
+            'device-123',
+            'Trusted device',
+            'admin-a'
+        );
+    }
+
     #[TestDox('Rule lifecycle operations cannot cross scope ownership')]
     public function testOwnership(): void
     {
diff --git a/tests/php/Unit/Service/FirewallRuleServicesTest.php b/tests/php/Unit/Service/FirewallRuleServicesTest.php
index 2b9bfff..06d5051 100644
--- a/tests/php/Unit/Service/FirewallRuleServicesTest.php
+++ b/tests/php/Unit/Service/FirewallRuleServicesTest.php
@@ -122,6 +122,23 @@ class FirewallRuleServicesTest extends TestCase
         $this->systemService()->blockIp('203.0.113.10');
     }
 
+    #[TestDox('Generic creation remains behind tenant and system management permissions')]
+    public function testGenericCreationPermissions(): void
+    {
+        $this->identity->method('hasPermission')->willReturn(false);
+        $this->store->expects(self::never())->method('depositRule');
+
+        try {
+            $this->tenantService()->createRule('ip', 'block', '203.0.113.10', 'Abuse');
+            self::fail('Tenant creation should have been rejected.');
+        } catch (\RuntimeException $error) {
+            self::assertStringContainsString(TenantFirewallRuleService::PERMISSION_MANAGE, $error->getMessage());
+        }
+
+        $this->expectExceptionMessage(SystemFirewallRuleService::PERMISSION_MANAGE);
+        $this->systemService()->createRule('ip', 'block', '203.0.113.10', 'Abuse');
+    }
+
     private function allow(string $permission): void
     {
         $this->identity->method('hasPermission')->with($permission)->willReturn(true);