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Offline kayvdlans

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TCP sometimes fails and sometimes succeeds
« on: July 19, 2014, 05:23:19 PM »
Like the title says sometimes the TCP fails and other times it succeeds, but can somebody tell me why it does it?
And is it like a bad thing or shouldn't I worry about it?

EDIT: I think it has something to do with Simple Port Tester. When I use the portforward.com port checker, it always succeeds.
« Last Edit: July 20, 2014, 12:11:49 AM by kayvdlans »

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TCP sometimes fails and sometimes succeeds
« on: July 19, 2014, 05:23:19 PM »

Offline Shane

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Re: TCP sometimes fails and sometimes succeeds
« Reply #1 on: July 21, 2014, 12:14:21 PM »
Sounds like your firewall might be getting in the way of the simple port tester.

The port tester is simple, it opens the port on the system and listens for a connection on that port. So when it sees a connection come in from my site it will then say success. If for some reason the connection didn't come through or was blocked then it would say failed.

I have seen firewalls get in the way of it before. Since the port tester only needs that one connection attempt and nothing more, some firewalls keep the port blocked till it sees a connection come through, then it opens that port for the program, but at that point the connection test is done. :wink:

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Re: TCP sometimes fails and sometimes succeeds
« Reply #1 on: July 21, 2014, 12:14:21 PM »