Whether you hire outside consultants or do the testing yourself, here are some tips for making sure your time and money are well spent.

1. Set goals. Make sure you know before you start your penetration testing what you want the results to encompass. Adding in too many systems can be overwhelming and costly.

2. Assign staff and resources to the project. Penetration testing can be expensive, so you might as well get the most out of your consultant's time, says Joe Basirico, senior training engineer at Security Innovation. He recently worked on a project where the client did not assign staff to assist him and, unbeknownst to him, had only allocated a laptop for remote access. Each night, while Basirico conducted his tests off-site, the remote server would time out. He eventually found out that the company's cleaning person would close the lid on the laptop dedicated to his testing. Basirico called this lack of attention to the project a waste of their money.

3. Offer your tester documentation. The more information you share about your systems, the less legwork they have to do to come up to speed, which is less time on the clock. Include details about the types of encryption you use and system configurations.

4. Prioritize the results. Once you've got the results of your tests, map them to your goals. You can't tackle everything so make sure you do a solid risk assessment of the vulnerabilities to lead the way. Try to check things off the list that have immediate payback for your clients' security.

5. Understand no network is perfectly secure. It can be shocking to receive the results of a penetration test, according to Chris Nickerson, security services lead at Alternative Technology. But it's better to know what you're dealing with and fix it than to have a false sense of security and pay the price later.

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