diff --git a/src/freenas/usr/local/bin/truenas-grub.py b/src/freenas/usr/local/bin/truenas-grub.py
index 842bc414ae369..88403a022f1a9 100755
--- a/src/freenas/usr/local/bin/truenas-grub.py
+++ b/src/freenas/usr/local/bin/truenas-grub.py
@@ -3,10 +3,13 @@
 import psutil
 import os
 import json
+import logging
 
 from middlewared.utils.serial import serial_port_choices
 from middlewared.utils.db import query_config_table
+from middlewared.utils.vendor import Vendors
 
+logger = logging.getLogger(__name__)
 
 def get_serial_ports():
     return {e['start']: e['name'].replace('uart', 'ttyS') for e in serial_port_choices()}
@@ -16,12 +19,14 @@ def get_serial_ports():
     advanced = query_config_table("system_advanced", prefix="adv_")
     kernel_extra_options = advanced.get("kernel_extra_options") or ""
 
-    # check for /data/.vendor
+    vendor = Vendors.TRUENAS_SCALE
     try:
         with open("/data/.vendor", "r") as f:
-            vendor = json.loads(f.read()).get("name", "TrueNAS Scale")
+            vendor = json.loads(f.read()).get("name", Vendors.TRUENAS_SCALE)
     except FileNotFoundError:
-        vendor = "TrueNAS Scale"
+        pass
+    except Exception:
+        logger.error("Failed to parse /data/.vendor", exc_info=True)
 
     # We need to allow tpm in grub as sedutil-cli requires it
     # `zfsforce=1` is needed because FreeBSD bootloader imports boot pool with hostid=0 while SCALE releases up to
diff --git a/src/middlewared/middlewared/plugins/support.py b/src/middlewared/middlewared/plugins/support.py
index c8a7735bc514f..e27e92ab173ac 100644
--- a/src/middlewared/middlewared/plugins/support.py
+++ b/src/middlewared/middlewared/plugins/support.py
@@ -108,6 +108,9 @@ async def is_available(self):
         Returns whether Proactive Support is available for this product type and current license.
         """
 
+        if await self.middleware.call('system.vendor.name'):
+            return False
+
         if not await self.middleware.call('system.is_enterprise'):
             return False
 
@@ -224,6 +227,10 @@ async def new_ticket(self, job, data):
         For SCALE Enterprise `token` and `type` attributes are not required.
         """
 
+        vendor = await self.middleware.call('system.vendor.name')
+        if vendor:
+            raise CallError(f'Support is not available for this product ({vendor})', errno.EINVAL)
+
         await self.middleware.call('network.general.will_perform_activity', 'support')
 
         job.set_progress(1, 'Gathering data')