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Great links. I should have been clearer that I am not looking for internal scans, only scanning from outside the network to see what is open and unsecured though the Firewall.
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Great links. I should have been clearer that I am not looking for internal scans, only scanning from outside the network to see what is open and unsecured though the Firewall.

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<a href="http://nmap.org/" rel="ugc">NMAP</a> is your man :) thanks for the points.
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NMAP [http://nmap.org/] is your man :) thanks for the points.

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Nap is what you want as well as try Shieldsup online from FTC.com.
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Nap is what you want as well as try Shieldsup online from FTC.com.

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Thanks for the grade. Good luck.
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I have a client that needs a vulnerability scan done right away due to an audit. Is there a good, free software that I can download and run from outside the network to see what is opened.
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I have a client that needs a vulnerability scan done right away due to an audit. Is there a good, free software that I can download and run from outside the network to see what is opened.

Free network vulerabilty scanners

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).

Network Analysis

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.