Which iptable action will send a response back to the source host?
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DROP packet . Maybe, not completely sure
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The answer to this question is REJECT. In this iptable action, when the package reaches the firewall and after being run against the set of rules, and the package is found to not meet the requirements, then this package is sent back to the source host with the message destination unreachable.
This is not in case of DROP where the package is simply stopped and no more action is taken.
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