diff --git a/squinnondation/messages.py b/squinnondation/messages.py
index f8948c9..fad4f57 100644
--- a/squinnondation/messages.py
+++ b/squinnondation/messages.py
@@ -73,7 +73,7 @@ class Pad1TLV(TLV):
         return self.type.to_bytes(1, sys.byteorder)
 
     def handle(self, squirrel: Any, sender: Any) -> None:
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your Pad1TLV. Please say me Hello before.")))
@@ -123,7 +123,7 @@ class PadNTLV(TLV):
             + self.mbz[:self.length]
 
     def handle(self, squirrel: Any, sender: Any) -> None:
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your PadNTLV. Please say me Hello before.")))
@@ -239,7 +239,7 @@ class NeighbourTLV(TLV):
             self.port.to_bytes(2, sys.byteorder)
 
     def handle(self, squirrel: Any, sender: Any) -> None:
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your NeighbourTLV. Please say me Hello before.")))
@@ -295,7 +295,7 @@ class DataTLV(TLV):
         """
         A message has been sent. We log it.
         """
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your DataTLV. Please say me Hello before.")))
@@ -364,7 +364,7 @@ class AckTLV(TLV):
         """
         When an AckTLV is received, we know that we do not have to inundate that neighbour anymore.
         """
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your AckTLV. Please say me Hello before.")))
@@ -409,7 +409,7 @@ class GoAwayTLV(TLV):
             self.message.encode("UTF-8")[:self.length - 1]
 
     def handle(self, squirrel: Any, sender: Any) -> None:
-        if not sender.active or not sender.id:
+        if not sender.active or not sender.symmetric or not sender.id:
             # It doesn't say hello, we don't listen to it
             squirrel.send_packet(sender, Packet.construct(WarningTLV.construct(
                 "You are not my neighbour, I don't listen to your GoAwayTLV. Please say me Hello before.")))