diff --git a/dbService.py b/dbService.py
index f9217ee..3227558 100644
--- a/dbService.py
+++ b/dbService.py
@@ -10,9 +10,7 @@ class MultiDeviceDbSupport:
         self.dbStore:AsyncDatabase = dbStore
         self.core = core
 
-    #return {"$or": [{"device_uuid": value}]}
-    def deviceHash2Match(self, devices_hashes = []):
-        #print(devices_hashes)
+    def device2Hash(self, devices_hashes = []):
         if devices_hashes == None:
             devices_hashes = [self.core.defaultDeviceUUIDHash]
         elif (type(devices_hashes) == list):
@@ -22,6 +20,11 @@ class MultiDeviceDbSupport:
         
         if devices_hashes.__len__() == 0:
             devices_hashes = [self.core.defaultDeviceUUIDHash]
+        return devices_hashes
+
+    #return {"$or": [{"device_uuid": value}]}
+    def deviceHash2Match(self, devices_hashes = []):
+        devices_hashes = self.device2Hash(devices_hashes)
 
         #print(devices_hashes)
         orPart = []
@@ -32,6 +35,24 @@ class MultiDeviceDbSupport:
                     orPart.append({"device_uuid": None})
                 orPart.append({"device_uuid": uuid})
         return orPart#-->{"$or": orPart}
+    
+    def devicesHash2UuidList(self, devices_hashes = []):
+        devices_hashes = self.device2Hash(devices_hashes)
+        uuids = []
+        for hash in devices_hashes:
+            uuid = self.core.devicesUuidHashToUuid.get(hash, "")
+            if uuid:
+                uuids.append(uuid)
+        return uuids
+    
+    def devicesHash2NumList(self, devices_hashes = []):
+        uuids = self.devicesHash2UuidList(devices_hashes)
+        nums = []
+        for device in self.core.devices:
+            if device.nid:
+                nums.append(device.nid)
+
+        return nums
 
 class MessageDbService(MultiDeviceDbSupport):
     MESSAGE_PORTNUM = 1
@@ -145,7 +166,8 @@ class PacketDbService(MultiDeviceDbSupport):
                                 after: float = -1, 
                                 before: float = -1, 
                                 nums: List[int] = [],
-                                devices = []):
+                                devices = [],
+                                ignore_host = False):
         pipeline = []
         match = {"$or": self.deviceHash2Match(devices)}
         if after != -1 or before != -1:
@@ -160,6 +182,9 @@ class PacketDbService(MultiDeviceDbSupport):
                 nums = [nums]
             match["from"] = {"$in":nums}
 
+        if ignore_host and "from" not in match:
+            match["from"] = {"$nin": self.devicesHash2NumList(devices)}
+
         pipeline.append({"$match":match})
         collection = self.dbStore['packet']
         c = await collection.aggregate(pipeline)
@@ -173,7 +198,8 @@ class PacketDbService(MultiDeviceDbSupport):
                                        portnums: List[int] = [],
                                        packetsPerNode = False,
                                        packetsSumNode = False,
-                                       devices = []):
+                                       devices = [],
+                                       ignore_host = False):
         pipeline = []
 
         match = {"$or": self.deviceHash2Match(devices)}
@@ -189,6 +215,9 @@ class PacketDbService(MultiDeviceDbSupport):
                 nums = [nums]
             match["from"] = {"$in":nums}
 
+        if ignore_host and "from" not in match:
+            match["from"] = {"$nin": self.devicesHash2NumList(devices)}
+
         if portnums:
             if type(portnums) != list:
                 portnums = [portnums]