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Java Forum / General / January 2006Help! How do I get Java sockets to work in Windows 2000?
I'm writing an STMP program that need to connect to an MX server. My code works fine from a Unix machine, but I need to run it from Windows: InetSocketAddress address = new InetSocketAddress(server, 25); Socket socket = new Socket(); socket.connect(address, 5000); // connect with 5 second timeout When I run my java program in the command prompt I get this error message. java.net.ConnectException: Connection timed out: How to I get this socket to work? Do I have to create a bridge between a Java Socket and a Windows Socket? > I'm writing an STMP program that need to connect to an MX server. My > code works fine from a Unix machine, but I need to run it from Windows: [quoted text clipped - 12 lines] > How to I get this socket to work? > Do I have to create a bridge between a Java Socket and a Windows Socket? firewall?  SignatureBeware the False Authority Syndrome There is no firewall present There is no firewall present Windows 2000 doesn't have a firewall On 11 Jan 2006 18:27:53 -0800, "Thundar" <jschleifer@iis-consulting.com> wrote, quoted or indirectly quoted someone who said : >Windows 2000 doesn't have a firewall of course there are a ton of third party ones. See http://mindprod.com/jgloss/firewall.html And you can get one built in to your router pretty cheaply these days. SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. I'm trying to get the sockets to work, I dont care about third party firewalls. *sigh* I think this is the last time I turn to google msg boards for help. > I'm trying to get the sockets to work, I dont care about third party > firewalls. *sigh* I think this is the last time I turn to google msg > boards for help. Try using telnet to connect to your server from Windows.... > telnet server 25 Or just configure your mail client to connect to the server. That at least should tell you if there's something other than your code that's stopping you reaching the server. Make sure the host name resolves. Try using just the IP address. DNS name lookup or NIS name lookup could be the problem. Using the IP address will rule this out. Open a cmd window and try pinging the server. Run the program and in a seperate cmd window use the command netstat -ni|more and look for the server's IP address, the state of the socket will show you what is going on with your socket connection. > I'm trying to get the sockets to work, I dont care about third party > firewalls. I think what people are trying to say is that connecting maybe a problem on the OS level and have nothing to do with your code. Grab another mail client not previously installed on the system, run it and verify it connects and you will have eliminated the possibility that it is a firewall/network/hardware issue and established that the computer is capible of connecting to the server. Often times you will find that when there cannot possibly be a mistake with the piece of code you are trying to fix, that you are right, there isn't a mistake with it. > *sigh* I think this is the last time I turn to google msg > boards for help. Try usenet instead, it allows you to quote who you are replying to so people don't get confused. -- LTP :) On 11 Jan 2006 19:42:06 -0800, "Thundar" <jschleifer@iis-consulting.com> wrote, quoted or indirectly quoted someone who said : >I'm trying to get the sockets to work, I dont care about third party >firewalls. *sigh* I think this is the last time I turn to google msg >boards for help. People can't help you if they don't understand your problem. "getting sockets to work" is to broad. You CAN'T ignore the problem of firewalls when you use sockets. That's one reason why they are not more widely used. You can temporarily ignore the problem by using a pair of machines on the same LAN without a firewall between them. This is not a Google message board. This is a newsgroup. Google is only one way, and not a very good way, of using it. See http://mindprod.com/jgloss/newsgroups.html SignatureCanadian Mind Products, Roedy Green. http://mindprod.com Java custom programming, consulting and coaching. > I'm trying to get the sockets to work, I dont care about third party > firewalls. *sigh* I think this is the last time I turn to google msg > boards for help. Usenet is not Google Groups, though Google Groups participates in and archives Usenet. > Windows 2000 doesn't have a firewall The firewall would be on the SMTP server, or between your W2k client and the SMTP server. It's a possibility that the SMTP server has been setup to only allow connections from certain clients, and a firewall is one simple way of achieving this. As someone else suggested, test the connection using telnet. SignatureNigel Wade, System Administrator, Space Plasma Physics Group, University of Leicester, Leicester, LE1 7RH, UK E-mail : nmw@ion.le.ac.uk Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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