diff --git a/src/io/pipeer.cpp b/src/io/pipeer.cpp
index 2dc7f0da..637dc72c 100755
--- a/src/io/pipeer.cpp
+++ b/src/io/pipeer.cpp
@@ -235,7 +235,7 @@ bool PIPeer::send(const PIString & to, const void * data, int size) {
 	ba << int(4) << self_info.name << to << int(0) << size;
 	PIByteArray fmsg(data, size), cmsg;
 	int msg_count = (size - 1) / _PIPEER_MSG_SIZE + 1;
-	piCout << "[PIPeer] send" << size << "bytes in" << msg_count << "packets ...";
+	//piCout << "[PIPeer] send" << size << "bytes in" << msg_count << "packets ...";
 	for (int i = 0; i < msg_count; ++i) {
 		int csize = (i == msg_count - 1) ? ((size - 1) % _PIPEER_MSG_SIZE + 1) : _PIPEER_MSG_SIZE;
 		cmsg = ba;
@@ -243,7 +243,7 @@ bool PIPeer::send(const PIString & to, const void * data, int size) {
 		cmsg.append(fmsg.data(i * _PIPEER_MSG_SIZE), csize);
 		if (!sendToNeighbour(dp, cmsg)) return false;
 	}
-	piCout << "[PIPeer] send" << size << "bytes ok";
+	//piCout << "[PIPeer] send" << size << "bytes ok";
 	return true;
 }
 
@@ -279,17 +279,19 @@ bool PIPeer::dataRead(uchar * readed, int size) {
 			}
 			return true;
 		}
-		// send ping back
-		piForeachC (PeerInfo & p, peers) {
-			if (!p.isNeighbour()) continue;
-			if (p.name != to) continue;
-			sba = PIByteArray(readed, size);
-			//piCout << "ping from" << to << addr << ", send back to" << p.name;
-			piForeachC (PeerInfo::Address & a, p.addresses) {
-				if (eth_send.send(a.address, sba))
-					diag_s.received(sba.size_s());
+		if (from == self_info.name) { // send ping back
+			const PeerInfo * pi = getPeerByName(to);
+			if (pi) {
+				if (pi->isNeighbour()) {
+					sba = PIByteArray(readed, size);
+					//piCout << "ping from" << to << addr << ", send back to" << p.name;
+					piForeachC (PeerInfo::Address & a, pi->addresses) {
+						if (eth_send.send(a.address, sba))
+							diag_s.received(sba.size_s());
+					}
+				}
+				return true;
 			}
-			return true;
 		}
 		//PIEthernet * eth = (PIEthernet*)emitter();
 		//()->send();
@@ -467,7 +469,7 @@ bool PIPeer::mbcastRead(uchar * data, int size) {
 bool PIPeer::sendToNeighbour(PIPeer::PeerInfo * peer, const PIByteArray & ba) {
 	//if (peer->_neth == 0) return false;
 	PIString addr = peer->fastestAddress();
-	piCout << "[PIPeer] sendToNeighbour" << peer->name << addr << ba.size_s() << "bytes ...";
+	//piCout << "[PIPeer] sendToNeighbour" << peer->name << addr << ba.size_s() << "bytes ...";
 	//bool ok = peer->_neth->send(peer->_naddress, ba.data(), ba.size_s());
 	bool ok = eth_send.send(addr, ba);
 	//piCout << "[PIPeer] sendToNeighbour" << (ok ? "ok" : "fail");
@@ -522,7 +524,7 @@ void PIPeer::pingNeighbours() {
 	ba << int(5) << self_info.name;
 	//piCout << "pingNeighbours" << peers.size();
 	piForeach (PeerInfo & p, peers) {
-		piCout << "  ping neighbour" << p.name << p.ping();
+		//piCout << "  ping neighbour" << p.name << p.ping();
 		if (!p.isNeighbour()) continue;
 		piForeach (PeerInfo::Address & a, p.addresses) {
 			//piCout << "    address" << a.address << a.wait_ping;