diff --git a/minode/connection.py b/minode/connection.py
index d0d37f8..395ffa9 100644
--- a/minode/connection.py
+++ b/minode/connection.py
@@ -417,6 +417,8 @@ class ConnectionBase(threading.Thread):
         addr = message.Addr.from_message(m)
         logging.debug('%s:%s -> %s', self.host_print, self.port, addr)
         for a in addr.addresses:
+            if not a.host or a.port == 0:
+                continue
             if (a.host, a.port) not in shared.core_nodes:
                 shared.unchecked_node_pool.add((a.host, a.port))
 
diff --git a/minode/structure.py b/minode/structure.py
index 3df6920..01fcd15 100644
--- a/minode/structure.py
+++ b/minode/structure.py
@@ -228,7 +228,7 @@ class NetAddr(IStructure):
 
     def to_bytes(self):
         b = b''
-        b += struct.pack('>Q', int(time.time()))
+        b += struct.pack('>Q', int(time.time() - 5400))
         b += struct.pack('>I', self.stream)
         b += NetAddrNoPrefix(self.services, self.host, self.port).to_bytes()
         return b