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I have a client / server application and both client and server are on windows 7. If I disable the firewall on the pc acting as a server everything works great but if I enable it back the client is not able to connect anymore. I'd like to find out what I have to allow on windows firewall settings but I have no clues about what's being blocked and why. Also enabling the whole traffic coming and going to a certain ip would be acceptable as a solution.


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What is the client/server application? Is it something you bought, or someone wrote custom? – bwall Jun 8 '11 at 17:14
Someone wrote custom... That's my problem. I don't know what are the process / services involved... And windows 7 firewall won't give any kind of feedback after blocking :/ – Pitto Jun 8 '11 at 17:17
up vote 2 down vote accepted

Try to shutdown the firewall,
then use the "netstat" command to see which ports its using,
then open them in the firewall.

another option would be to use sysinternal's TCPview

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Ha! You did it, mate! :D Thanks. – Pitto Jun 8 '11 at 18:53
glad it helped, ran into a similar issue a few weeks ago – madmaze Jun 8 '11 at 18:55

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