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Kali Linux Network Scanning Cookbook by Justin Hutchens

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Firewall identification with Metasploit

Metasploit has a scanning auxiliary module that can be used to perform multithreaded analysis of network ports to determine if those ports are filtered, based on SYN/ACK probe-response analysis.

Getting ready

To use Metasploit to perform firewall identification, you will need to have a remote system that is running network services. Additionally, you will need to implement some type of filtering mechanism. This can be done with an independent firewall device or with host-based filtering such as Windows firewall. By manipulating the filtering settings on the firewall device, you should be able to modify the results of the scans.

How to do it…

To use the Metasploit ACK scan module to perform firewall and filtering ...

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