Just an idea popping up in my mind: firewall? Regards, Nicola From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Grotjahn Clemens (CM-AI/PJ-CF22) Sent: Donnerstag, 14. Januar 2010 13:46 To: boost-users@lists.boost.org Subject: [Boost-users] [asio] asio-client only connects to server when on same machine hi everybody, i have an issue with my asio-client that wants to connect to an asio-server. when i set my server on a machine in our network to listening on a port (>1024) and then try to connect with my client via this port, i get a "Connection refused"-exception. this happens every time the server and client are located on different machines. if i try this on the same machine it works fine! also, if i try to connect via telnet from another machine it works! here's the client-setup-code snippet, maybe i missed a special config there?: tcp::resolver resolver( _io ); //_io is class-member tcp::resolver::query query( server, port ); //server and port are char-buffers tcp::resolver::iterator iter = resolver.resolve( query ); _socket = new tcp::socket( _io ); tcp::resolver::iterator end; // End marker. boost::system::error_code error = error::host_not_found; while (error && iter != end) { _socket->close(); _socket->connect(*iter++, error); } if (error) throw boost::system::system_error( error ); } catch( std::exception& e ) { cout << "NetClient Konstruktor: " << e.what() << endl; } --- Visit us at FOE 2010 / January 20-22 / Tokyo Big Sight, Japan / East Hall 2-30 http://www.foe.jp/en/ Photonics West 2010 / January 23-28 / The Moscone Center, San Francisco, CA / Booth 4601-32 http://spie.org/photonics-west.xml