--- a/plugins/mod_c2s.lua	Thu Sep 24 20:02:57 2015 +0200
+++ b/plugins/mod_c2s.lua	Thu Sep 24 20:05:23 2015 +0200
@@ -83,7 +83,12 @@
 
 	local features = st.stanza("stream:features");
 	hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
-	send(features);
+	if features.tags[1] or session.full_jid then
+		send(features);
+	else
+		(session.log or log)("warn", "No features to offer");
+		session:close{ condition = "undefined-condition", text = "No features to proceed with" };
+	end
 end
 
 function stream_callbacks.streamclosed(session)

--- a/plugins/mod_s2s/mod_s2s.lua	Thu Sep 24 20:02:57 2015 +0200
+++ b/plugins/mod_s2s/mod_s2s.lua	Thu Sep 24 20:05:23 2015 +0200
@@ -351,8 +351,13 @@
 				(session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", from or session.ip or "unknown host");
 			end
 
-			log("debug", "Sending stream features: %s", tostring(features));
-			session.sends2s(features);
+			if ( session.type == "s2sin" or session.type == "s2sout" ) or features.tags[1] then
+				log("debug", "Sending stream features: %s", tostring(features));
+				session.sends2s(features);
+			else
+				(session.log or log)("warn", "No features to offer, giving up");
+				session:close({ condition = "undefined-condition", text = "No features to offer" });
+			end
 		end
 	elseif session.direction == "outgoing" then
 		session.notopen = nil;