diff --git a/contrib/seeds/makeseeds.py b/contrib/seeds/makeseeds.py
--- a/contrib/seeds/makeseeds.py
+++ b/contrib/seeds/makeseeds.py
@@ -15,7 +15,7 @@
 # These are hosts that have been observed to be behaving strangely (e.g.
 # aggressively connecting to every node).
 SUSPICIOUS_HOSTS = {
-    "130.211.129.106", "178.63.107.226",
+    "23.92.36.9", "130.211.129.106", "178.63.107.226",
     "83.81.130.26", "88.198.17.7", "148.251.238.178", "176.9.46.6",
     "54.173.72.127", "54.174.10.182", "54.183.64.54", "54.194.231.211",
     "54.66.214.167", "54.66.220.137", "54.67.33.14", "54.77.251.214",
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -3125,6 +3125,10 @@
                CMessageHeader::MESSAGE_START_SIZE) != 0) {
         LogPrintf("PROCESSMESSAGE: INVALID MESSAGESTART %s peer=%d\n",
                   SanitizeString(msg.hdr.GetCommand()), pfrom->id);
+
+        // Make sure we ban where that come from for some time.
+        connman.Ban(pfrom->addr, BanReasonNodeMisbehaving);
+
         pfrom->fDisconnect = true;
         return false;
     }