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POForefront TMG vs java and php (ftp)
 

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  1. POForefront TMG vs java and php (ftp)
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    <p>I've got a computer behind ForeFront TMG 7.0 and public remote ftp server. TMG client is installed. Windows firewall is off. Antivirus: McAfee virus scan Enterprise (8.8) + AntySpyware Enterprize (8.8) + No addons. Antivirus was tested on and off.</p> <p>It fails to connect to the server via Java and Php. Filezilla, explorer.exe and Go-written program connects without problems.</p> <p>For Java I get ConnectionRefused error:</p> <pre><code>java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at org.apache.commons.net.SocketClient.connect(SocketClient.java:182) at org.apache.commons.net.SocketClient.connect(SocketClient.java:203) </code></pre> <p>No matter how I'm trying to connect via Java:</p> <ul> <li>Apache FTP Client (active/passive - local/remote/both)</li> <li>Apache FTPS Client (all varians active|passive)</li> <li>Sauron FTP Client (same)</li> <li>Socket socket = new Socket(host, 21);</li> </ul> <p>Semetimes it trows connection timeout after 5 minutes of waiting. And the error is timeout exception. All varians are tested with direct connection, global proxy, ftp proxy, http proxy and all combinations of that. All variants are tested both by IP and hostname.</p> <p>Php-code sample that can not connect too:</p> <pre><code>&lt;?php $host = "ftphost"; $connect = ftp_connect($host,21); if(!$connect) { echo("Error: $host"); exit; } else { echo("Cheers: $host"); } ?&gt; </code></pre> <p>But filezilla connects without a problem. Explorer connects without a problem. Go-written progam connects without a problem.</p> <p>Any ideas what can block java and php? How can I figure out the policy or the program settings that are blocking JRE and Apache?</p>
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    1. COAny ideas what can block java and php? Firewalls and a lot of other things (Your OS, the network, the server, .. not granting access to untrusted software). Also wrong configuration like not using the system proxy. Compare using e.g. [wireshark](http://www.wireshark.org/)
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    2. COhad some problems with tmg in the past, find out that it can block some url by ip, but not on pc-name, or vice-versa. Try to play with that
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    3. COThis is not site-blocking because FileZilla and others connects normaly.
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