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Which ports do I close [or open] on my firewall to block [or allow] Instant Messenger / Instant Messaging chat?

April 26, 2017block firewall Instant instant messaging Messenger ports

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Which ports do I close [or open] on my firewall to block [or allow] Instant Messenger / Instant Messaging chat?

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(6.12) I blocked certain ports, but chat, games, etc. are still not being blocked.A: Instructions on how to block chat and messaging programs changes from time to time as new versions of these programs are released.