Comments on: Which ports do web browsers block? http://enablesecurity.com/2008/06/23/which-ports-do-web-browsers-block/ Security Consultancy, Research and Development Fri, 30 Jul 2010 17:30:20 +0000 hourly 1 http://wordpress.com/ By: Dave http://enablesecurity.com/2008/06/23/which-ports-do-web-browsers-block/#comment-354 Dave Fri, 12 Mar 2010 15:47:27 +0000 http://enablesecurity.wordpress.com/?p=28#comment-354 Firebind.com is a web-based, client-server architecture that allows a user to test outbound connectivity for any of the 65535 TCP Ports. In other words, it will tell you whether a firewall is blocking your IP device from reaching the Internet or not. It can distinguish between browser blocked ports (like those listed above), ports blocked by a TCP RESET, and ports blocked by a TCP TIMEOUT. It was designed to help users determine whether their applications are being blocked or not, especially for road warriors connecting from hotels, airports, coffee shops, etc. But it can also be used by IT admins to validate corporate firewall outbound ACLs. http://www.firebind.com One helpful feature is the ability to be able to launch a test from a link. This test below will check whether port 3389 (Windows Remote Desktop) is open to the Internet (outbound direction) from the user's machine. http://www.firebind.com/3389 You can do a range of ports as well. This test below is for all of the Yahoo Messenger TCP Ports. http://www.firebind.com/80,5000-5001,5050,5100-5101 Firebind.com is a web-based, client-server architecture that allows a user to test outbound connectivity for any of the 65535 TCP Ports. In other words, it will tell you whether a firewall is blocking your IP device from reaching the Internet or not. It can distinguish between browser blocked ports (like those listed above), ports blocked by a TCP RESET, and ports blocked by a TCP TIMEOUT.
It was designed to help users determine whether their applications are being blocked or not, especially for road warriors connecting from hotels, airports, coffee shops, etc. But it can also be used by IT admins to validate corporate firewall outbound ACLs.

http://www.firebind.com

One helpful feature is the ability to be able to launch a test from a link. This test below will check whether port 3389 (Windows Remote Desktop) is open to the Internet (outbound direction) from the user’s machine.

http://www.firebind.com/3389

You can do a range of ports as well. This test below is for all of the Yahoo Messenger TCP Ports.

http://www.firebind.com/80,5000-5001,5050,5100-5101

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