Index: src/d_clisrv.c
===================================================================
--- src/d_clisrv.c	(revision 1995)
+++ src/d_clisrv.c	(working copy)
@@ -1845,6 +1845,8 @@
 				SV_SendRefuse(node, "The server is not accepting joins for the moment");
 			else if (D_NumPlayers() >= cv_maxplayers.value)
 				SV_SendRefuse(node, va("Maximum players reached (max:%d)", cv_maxplayers.value));
+			else if (netbuffer->u.clientcfg.localplayers > 2)	// Hacked client?
+				SV_SendRefuse(node, va("Too many players from this node."));
 			else
 			{
 				boolean newnode = false;