diff --git a/qubesadmin/device_protocol.py b/qubesadmin/device_protocol.py
index f20cbb3f..55e7c7f8 100644
--- a/qubesadmin/device_protocol.py
+++ b/qubesadmin/device_protocol.py
@@ -258,29 +258,35 @@ def __init__(self, backend_domain, port_id, devclass):
         self.__devclass = devclass
 
     def __hash__(self):
-        return hash((self.backend_domain.name, self.port_id, self.devclass))
+        return hash((self.backend_name, self.port_id, self.devclass))
 
     def __eq__(self, other):
         if isinstance(other, Port):
             return (
-                self.backend_domain == other.backend_domain and
-                self.port_id == other.port_id and
-                self.devclass == other.devclass
+                    self.backend_name == other.backend_name and
+                    self.port_id == other.port_id and
+                    self.devclass == other.devclass
             )
         return False
 
     def __lt__(self, other):
         if isinstance(other, Port):
-            return (self.backend_domain.name, self.devclass, self.port_id) < \
-                   (other.backend_domain.name, other.devclass, other.port_id)
+            return (self.backend_name, self.devclass, self.port_id) < \
+                   (self.backend_name, other.devclass, other.port_id)
         raise TypeError(f"Comparing instances of 'Port' and '{type(other)}' "
                         "is not supported")
 
     def __repr__(self):
-        return f"{self.backend_domain.name}+{self.port_id}"
+        return f"{self.backend_name}+{self.port_id}"
 
     def __str__(self):
-        return f"{self.backend_domain.name}:{self.port_id}"
+        return f"{self.backend_name}:{self.port_id}"
+
+    @property
+    def backend_name(self) -> str:
+        if self.backend_domain is not None:
+            return self.backend_domain.name
+        return "*"
 
     @classmethod
     def from_qarg(
@@ -324,7 +330,7 @@ def port_id(self) -> str:
         return self.__port_id
 
     @property
-    def backend_domain(self) -> QubesVM:
+    def backend_domain(self) -> Optional[QubesVM]:
         """ Which domain exposed this port. (immutable)"""
         return self.__backend_domain
 
@@ -387,6 +393,13 @@ def backend_domain(self):
             return self.port.backend_domain
         return '*'
 
+    @property
+    def backend_name(self):
+        if self.port != '*':
+            return self.port.backend_name
+        return '*'
+
+
     @property
     def port_id(self):
         if self.port != '*' and self.port.port_id is not None:
@@ -1090,15 +1103,19 @@ def __lt__(self, other):
 
     @property
     def backend_domain(self):
-        return self.virtual_device.port.backend_domain
+        return self.virtual_device.backend_domain
+
+    @property
+    def backend_name(self) -> str:
+        return self.virtual_device.backend_name
 
     @property
     def port_id(self):
-        return self.virtual_device.port.port_id
+        return self.virtual_device.port_id
 
     @property
     def devclass(self):
-        return self.virtual_device.port.devclass
+        return self.virtual_device.devclass
 
     @property
     def device_id(self):