There is no simple tool to do this Osama. Try connecting to 1720 on some
servers on other networks. While you do this do use a sniffer. You should
get a connectrion refused (RST) from the server. Verify this with packets
captured by sniffer. If you simply see syn packets going out and no
connection refused message, that means a firewall is dropping them silently.
Some FW's will send the reject message themselves Osama. You will also be
able to see this in the packet dump. These problems take a lot of trial and
error and cooperation of your ISP to resolve but are not impossible to
troubleshoot.


""Osama Kamal""  wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I am having a problem with a blocked port somewhere on the internet down
to
> my router, my ISP is denying any blocking from their side, is there is any
> way to know where exactly the port is blocked?
>
> Thanks




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