Security

Towards Filtering and Alerting Rule Rewriting on Single-Component Policies

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Executive Summary

The use of firewalls and Network Intrusion Detection Systems (NIDSs) is the dominant method to survey and guarantee the security policy in current corporate networks. On the one hand, firewalls are traditional security components which provide means to filter traffic within corporate networks, as well as to police the incoming and out-coming interaction with the Internet. On the other hand, NIDSs are complementary security components used to enhance the visibility level of the network, pointing to malicious or anomalous traffic. To properly configure both firewalls and NIDSs, it is necessary the use of a set of configuration rules, i.e., a set of filtering or alerting rules.

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