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“>This article continues the Netfilter series by looking at the various Netfilter modules and writing a few basic filter rules.Previously, we looked at Netfilter and the built-ins within it, both chains and targets. Remember, there are only four built-in targets, ACCEPT, DROP, QUEUE, and RETURN. Everything else that we want to do with Netfilter, target-wise, has to be created first. Recall that a target is the action to be taken for any packet matching the rule. This target  
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