Failing to store the log output from their security devices, or not doing so with enough granularity is one of the worst things you can do in terms of network security; not only will you not be alerted when you're under attack, but you'll have little or no traceability when you're carrying out your post-breach investigation. By ensuring that all outputs from security devices are logged correctly organizations will not only save time and money further down the line but will also enhance security by being able to properly monitor what is happening on their networks. Enterprises need to continuously monitor the state of their firewall security, but by following these simple steps businesses can avoid some of the core misconfigurations and improve their overall security posture. Join the Network World communities on Facebook and LinkedIn to comment on topics that are top of mind. Copyright © 2015 IDG Communications, Inc.
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If desired, enable your firewall to act as a dynamic host configuration protocol (DHCP) server, network time protocol (NTP) server, intrusion prevention system (IPS), etc. Disable any services you don't intend to use. To fulfill PCI DSS (Payment Card Industry Data Security Standard) requirements, configure your firewall to report to your logging server, and make sure that enough detail is included to satisfy requirement 10. 2 through 10. 3 of the PCI DSS. Step 5: Test your firewall configuration (Don't worry, it's an open-book test. ) First, verify that your firewall is blocking traffic that should be blocked according to your ACL configurations. This should include both vulnerability scanning and penetration testing. Be sure to keep a secure backup of your firewall configuration in case of any failures. If everything checks out, your firewall is ready for production. TEST TEST TEST the process of reverting back to a configuration. Before making any changes, document and test your recovering procedure.
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Five steps to optimize your firewall configuration | Network World
