1 files changed, 12 insertions, 0 deletions
diff --git a/incus-fwd b/incus-fwd
index 5b3c413..722db4c 100755
--- a/incus-fwd
+++ b/incus-fwd
@@ -436,6 +436,18 @@ examples:
             print(f"Error: Unable to access instance '{args.instance}'", file=sys.stderr)
             sys.exit(1)
 
+    try:
+        instance_type = subprocess.check_output(
+            ['incus', 'list', '--format=csv', '--columns=t', args.instance],
+            stderr=subprocess.DEVNULL,
+            text=True
+        ).strip()
+        if instance_type.upper() == 'VIRTUAL-MACHINE':
+            print(f"Warning: Instance '{args.instance}' is a VM. Port forwarding only works with containers.", file=sys.stderr)
+            sys.exit(1)
+    except (FileNotFoundError, subprocess.CalledProcessError):
+        pass
+
     existing_mappings, device_to_mapping = load_existing_mappings(args.instance)
 
     reset_mode = args.map_all or args.unmap_all